81941680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:147

約数の個数: 160

約数和(自身を含む): 217128960

約数和(自身を除く): 135187280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 37, 38, 40, 47, 62, 74, 76, 80, 94, 95, 124, 148, 152, 155, 185, 188, 190, 235, 248, 296, 304, 310, 370, 376, 380, 470, 496, 589, 592, 620, 703, 740, 752, 760, 893, 940, 1147, 1178, 1240, 1406, 1457, 1480, 1520, 1739, 1786, 1880, 2294, 2356, 2480, 2812, 2914, 2945, 2960, 3478, 3515, 3572, 3760, 4465, 4588, 4712, 5624, 5735, 5828, 5890, 6956, 7030, 7144, 7285, 8695, 8930, 9176, 9424, 11248, 11470, 11656, 11780, 13912, 14060, 14288, 14570, 17390, 17860, 18352, 21793, 22940, 23312, 23560, 27683, 27824, 28120, 29140, 33041, 34780, 35720, 43586, 45880, 47120, 53909, 55366, 56240, 58280, 66082, 69560, 71440, 87172, 91760, 107818, 108965, 110732, 116560, 132164, 138415, 139120, 165205, 174344, 215636, 217930, 221464, 264328, 269545, 276830, 330410, 348688, 431272, 435860, 442928, 528656, 539090, 553660, 660820, 862544, 871720, 1024271, 1078180, 1107320, 1321640, 1743440, 2048542, 2156360, 2214640, 2643280, 4097084, 4312720, 5121355, 8194168, 10242710, 16388336, 20485420, 40970840, 81941680]

約数ペア:

[(1, 81941680), (2, 40970840), (4, 20485420), (5, 16388336), (8, 10242710), (10, 8194168), (16, 5121355), (19, 4312720), (20, 4097084), (31, 2643280), (37, 2214640), (38, 2156360), (40, 2048542), (47, 1743440), (62, 1321640), (74, 1107320), (76, 1078180), (80, 1024271), (94, 871720), (95, 862544), (124, 660820), (148, 553660), (152, 539090), (155, 528656), (185, 442928), (188, 435860), (190, 431272), (235, 348688), (248, 330410), (296, 276830), (304, 269545), (310, 264328), (370, 221464), (376, 217930), (380, 215636), (470, 174344), (496, 165205), (589, 139120), (592, 138415), (620, 132164), (703, 116560), (740, 110732), (752, 108965), (760, 107818), (893, 91760), (940, 87172), (1147, 71440), (1178, 69560), (1240, 66082), (1406, 58280), (1457, 56240), (1480, 55366), (1520, 53909), (1739, 47120), (1786, 45880), (1880, 43586), (2294, 35720), (2356, 34780), (2480, 33041), (2812, 29140), (2914, 28120), (2945, 27824), (2960, 27683), (3478, 23560), (3515, 23312), (3572, 22940), (3760, 21793), (4465, 18352), (4588, 17860), (4712, 17390), (5624, 14570), (5735, 14288), (5828, 14060), (5890, 13912), (6956, 11780), (7030, 11656), (7144, 11470), (7285, 11248), (8695, 9424), (8930, 9176)]