20689967920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{2081}}^1$

素因数の和:2355

約数の個数: 160

約数和(自身を含む): 52542351360

約数和(自身を除く): 31852383440

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 38, 40, 62, 76, 80, 95, 124, 152, 155, 190, 211, 248, 304, 310, 380, 422, 496, 589, 620, 760, 844, 1055, 1178, 1240, 1520, 1688, 2081, 2110, 2356, 2480, 2945, 3376, 4009, 4162, 4220, 4712, 5890, 6541, 8018, 8324, 8440, 9424, 10405, 11780, 13082, 16036, 16648, 16880, 20045, 20810, 23560, 26164, 32072, 32705, 33296, 39539, 40090, 41620, 47120, 52328, 64144, 64511, 65410, 79078, 80180, 83240, 104656, 124279, 129022, 130820, 158156, 160360, 166480, 197695, 248558, 258044, 261640, 316312, 320720, 322555, 395390, 439091, 497116, 516088, 523280, 621395, 632624, 645110, 790780, 878182, 994232, 1032176, 1225709, 1242790, 1290220, 1581560, 1756364, 1988464, 2195455, 2451418, 2485580, 2580440, 3163120, 3512728, 4390910, 4902836, 4971160, 5160880, 6128545, 7025456, 8342729, 8781820, 9805672, 9942320, 12257090, 13611821, 16685458, 17563640, 19611344, 24514180, 27223642, 33370916, 35127280, 41713645, 49028360, 54447284, 66741832, 68059105, 83427290, 98056720, 108894568, 133483664, 136118210, 166854580, 217789136, 258624599, 272236420, 333709160, 517249198, 544472840, 667418320, 1034498396, 1088945680, 1293122995, 2068996792, 2586245990, 4137993584, 5172491980, 10344983960, 20689967920]

約数ペア:

[(1, 20689967920), (2, 10344983960), (4, 5172491980), (5, 4137993584), (8, 2586245990), (10, 2068996792), (16, 1293122995), (19, 1088945680), (20, 1034498396), (31, 667418320), (38, 544472840), (40, 517249198), (62, 333709160), (76, 272236420), (80, 258624599), (95, 217789136), (124, 166854580), (152, 136118210), (155, 133483664), (190, 108894568), (211, 98056720), (248, 83427290), (304, 68059105), (310, 66741832), (380, 54447284), (422, 49028360), (496, 41713645), (589, 35127280), (620, 33370916), (760, 27223642), (844, 24514180), (1055, 19611344), (1178, 17563640), (1240, 16685458), (1520, 13611821), (1688, 12257090), (2081, 9942320), (2110, 9805672), (2356, 8781820), (2480, 8342729), (2945, 7025456), (3376, 6128545), (4009, 5160880), (4162, 4971160), (4220, 4902836), (4712, 4390910), (5890, 3512728), (6541, 3163120), (8018, 2580440), (8324, 2485580), (8440, 2451418), (9424, 2195455), (10405, 1988464), (11780, 1756364), (13082, 1581560), (16036, 1290220), (16648, 1242790), (16880, 1225709), (20045, 1032176), (20810, 994232), (23560, 878182), (26164, 790780), (32072, 645110), (32705, 632624), (33296, 621395), (39539, 523280), (40090, 516088), (41620, 497116), (47120, 439091), (52328, 395390), (64144, 322555), (64511, 320720), (65410, 316312), (79078, 261640), (80180, 258044), (83240, 248558), (104656, 197695), (124279, 166480), (129022, 160360), (130820, 158156)]