20319880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2341}}^1$

素因数の和:2390

約数の個数: 64

約数和(自身を含む): 53959680

約数和(自身を除く): 33639800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2341, 4340, 4682, 8680, 9364, 11705, 16387, 18728, 23410, 32774, 46820, 65548, 72571, 81935, 93640, 131096, 145142, 163870, 290284, 327740, 362855, 507997, 580568, 655480, 725710, 1015994, 1451420, 2031988, 2539985, 2902840, 4063976, 5079970, 10159940, 20319880]

約数ペア:

[(1, 20319880), (2, 10159940), (4, 5079970), (5, 4063976), (7, 2902840), (8, 2539985), (10, 2031988), (14, 1451420), (20, 1015994), (28, 725710), (31, 655480), (35, 580568), (40, 507997), (56, 362855), (62, 327740), (70, 290284), (124, 163870), (140, 145142), (155, 131096), (217, 93640), (248, 81935), (280, 72571), (310, 65548), (434, 46820), (620, 32774), (868, 23410), (1085, 18728), (1240, 16387), (1736, 11705), (2170, 9364), (2341, 8680), (4340, 4682)]