25691980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21059}}^1$

素因数の和:21129

約数の個数: 24

約数和(自身を含む): 54840240

約数和(自身を除く): 29148260

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 21059, 42118, 84236, 105295, 210590, 421180, 1284599, 2569198, 5138396, 6422995, 12845990, 25691980]

約数ペア:

[(1, 25691980), (2, 12845990), (4, 6422995), (5, 5138396), (10, 2569198), (20, 1284599), (61, 421180), (122, 210590), (244, 105295), (305, 84236), (610, 42118), (1220, 21059)]