21203960

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14327}}^1$

素因数の和:14375

約数の個数: 32

約数和(自身を含む): 49001760

約数和(自身を除く): 27797800

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14327, 28654, 57308, 71635, 114616, 143270, 286540, 530099, 573080, 1060198, 2120396, 2650495, 4240792, 5300990, 10601980, 21203960]

約数ペア:

[(1, 21203960), (2, 10601980), (4, 5300990), (5, 4240792), (8, 2650495), (10, 2120396), (20, 1060198), (37, 573080), (40, 530099), (74, 286540), (148, 143270), (185, 114616), (296, 71635), (370, 57308), (740, 28654), (1480, 14327)]