20121033640

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{419}}^1\times {\mathrm{457}}^1$

素因数の和:995

約数の個数: 128

約数和(自身を含む): 47366726400

約数和(自身を除く): 27245692760

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 71, 74, 142, 148, 185, 284, 296, 355, 370, 419, 457, 568, 710, 740, 838, 914, 1420, 1480, 1676, 1828, 2095, 2285, 2627, 2840, 3352, 3656, 4190, 4570, 5254, 8380, 9140, 10508, 13135, 15503, 16760, 16909, 18280, 21016, 26270, 29749, 31006, 32447, 33818, 52540, 59498, 62012, 64894, 67636, 77515, 84545, 105080, 118996, 124024, 129788, 135272, 148745, 155030, 162235, 169090, 191483, 237992, 259576, 297490, 310060, 324470, 338180, 382966, 594980, 620120, 648940, 676360, 765932, 957415, 1100713, 1189960, 1200539, 1297880, 1531864, 1914830, 2201426, 2401078, 3829660, 4402852, 4802156, 5503565, 6002695, 7084871, 7659320, 8805704, 9604312, 11007130, 12005390, 13595293, 14169742, 22014260, 24010780, 27190586, 28339484, 35424355, 44028520, 48021560, 54381172, 56678968, 67976465, 70848710, 108762344, 135952930, 141697420, 271905860, 283394840, 503025841, 543811720, 1006051682, 2012103364, 2515129205, 4024206728, 5030258410, 10060516820, 20121033640]

約数ペア:

[(1, 20121033640), (2, 10060516820), (4, 5030258410), (5, 4024206728), (8, 2515129205), (10, 2012103364), (20, 1006051682), (37, 543811720), (40, 503025841), (71, 283394840), (74, 271905860), (142, 141697420), (148, 135952930), (185, 108762344), (284, 70848710), (296, 67976465), (355, 56678968), (370, 54381172), (419, 48021560), (457, 44028520), (568, 35424355), (710, 28339484), (740, 27190586), (838, 24010780), (914, 22014260), (1420, 14169742), (1480, 13595293), (1676, 12005390), (1828, 11007130), (2095, 9604312), (2285, 8805704), (2627, 7659320), (2840, 7084871), (3352, 6002695), (3656, 5503565), (4190, 4802156), (4570, 4402852), (5254, 3829660), (8380, 2401078), (9140, 2201426), (10508, 1914830), (13135, 1531864), (15503, 1297880), (16760, 1200539), (16909, 1189960), (18280, 1100713), (21016, 957415), (26270, 765932), (29749, 676360), (31006, 648940), (32447, 620120), (33818, 594980), (52540, 382966), (59498, 338180), (62012, 324470), (64894, 310060), (67636, 297490), (77515, 259576), (84545, 237992), (105080, 191483), (118996, 169090), (124024, 162235), (129788, 155030), (135272, 148745)]