19121420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{30841}}^1$

素因数の和:30881

約数の個数: 24

約数和(自身を含む): 41451648

約数和(自身を除く): 22330228

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 30841, 61682, 123364, 154205, 308410, 616820, 956071, 1912142, 3824284, 4780355, 9560710, 19121420]

約数ペア:

[(1, 19121420), (2, 9560710), (4, 4780355), (5, 3824284), (10, 1912142), (20, 956071), (31, 616820), (62, 308410), (124, 154205), (155, 123364), (310, 61682), (620, 30841)]