389071420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{318911}}^1$

素因数の和:318981

約数の個数: 24

約数和(自身を含む): 830446848

約数和(自身を除く): 441375428

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 318911, 637822, 1275644, 1594555, 3189110, 6378220, 19453571, 38907142, 77814284, 97267855, 194535710, 389071420]

約数ペア:

[(1, 389071420), (2, 194535710), (4, 97267855), (5, 77814284), (10, 38907142), (20, 19453571), (61, 6378220), (122, 3189110), (244, 1594555), (305, 1275644), (610, 637822), (1220, 318911)]