21254220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:352

約数の個数: 144

約数和(自身を含む): 71914752

約数和(自身を除く): 50660532

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 31, 36, 39, 45, 52, 60, 62, 65, 78, 90, 93, 117, 124, 130, 155, 156, 180, 186, 195, 234, 260, 279, 293, 310, 372, 390, 403, 465, 468, 558, 585, 586, 620, 780, 806, 879, 930, 1116, 1170, 1172, 1209, 1395, 1465, 1612, 1758, 1860, 2015, 2340, 2418, 2637, 2790, 2930, 3516, 3627, 3809, 4030, 4395, 4836, 5274, 5580, 5860, 6045, 7254, 7618, 8060, 8790, 9083, 10548, 11427, 12090, 13185, 14508, 15236, 17580, 18135, 18166, 19045, 22854, 24180, 26370, 27249, 34281, 36270, 36332, 38090, 45415, 45708, 52740, 54498, 57135, 68562, 72540, 76180, 81747, 90830, 108996, 114270, 118079, 136245, 137124, 163494, 171405, 181660, 228540, 236158, 272490, 326988, 342810, 354237, 408735, 472316, 544980, 590395, 685620, 708474, 817470, 1062711, 1180790, 1416948, 1634940, 1771185, 2125422, 2361580, 3542370, 4250844, 5313555, 7084740, 10627110, 21254220]

約数ペア:

[(1, 21254220), (2, 10627110), (3, 7084740), (4, 5313555), (5, 4250844), (6, 3542370), (9, 2361580), (10, 2125422), (12, 1771185), (13, 1634940), (15, 1416948), (18, 1180790), (20, 1062711), (26, 817470), (30, 708474), (31, 685620), (36, 590395), (39, 544980), (45, 472316), (52, 408735), (60, 354237), (62, 342810), (65, 326988), (78, 272490), (90, 236158), (93, 228540), (117, 181660), (124, 171405), (130, 163494), (155, 137124), (156, 136245), (180, 118079), (186, 114270), (195, 108996), (234, 90830), (260, 81747), (279, 76180), (293, 72540), (310, 68562), (372, 57135), (390, 54498), (403, 52740), (465, 45708), (468, 45415), (558, 38090), (585, 36332), (586, 36270), (620, 34281), (780, 27249), (806, 26370), (879, 24180), (930, 22854), (1116, 19045), (1170, 18166), (1172, 18135), (1209, 17580), (1395, 15236), (1465, 14508), (1612, 13185), (1758, 12090), (1860, 11427), (2015, 10548), (2340, 9083), (2418, 8790), (2637, 8060), (2790, 7618), (2930, 7254), (3516, 6045), (3627, 5860), (3809, 5580), (4030, 5274), (4395, 4836)]