21019910

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:440

約数の個数: 32

約数和(自身を含む): 38849760

約数和(自身を除く): 17829850

約数列:

[1, 2, 5, 10, 67, 134, 137, 229, 274, 335, 458, 670, 685, 1145, 1370, 2290, 9179, 15343, 18358, 30686, 31373, 45895, 62746, 76715, 91790, 153430, 156865, 313730, 2101991, 4203982, 10509955, 21019910]

約数ペア:

[(1, 21019910), (2, 10509955), (5, 4203982), (10, 2101991), (67, 313730), (134, 156865), (137, 153430), (229, 91790), (274, 76715), (335, 62746), (458, 45895), (670, 31373), (685, 30686), (1145, 18358), (1370, 15343), (2290, 9179)]