644020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2477}}^1$

素因数の和:2499

約数の個数: 24

約数和(自身を含む): 1457064

約数和(自身を除く): 813044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 2477, 4954, 9908, 12385, 24770, 32201, 49540, 64402, 128804, 161005, 322010, 644020]

約数ペア:

[(1, 644020), (2, 322010), (4, 161005), (5, 128804), (10, 64402), (13, 49540), (20, 32201), (26, 24770), (52, 12385), (65, 9908), (130, 4954), (260, 2477)]