638300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{491}}^1$

素因数の和:518

約数の個数: 36

約数和(自身を含む): 1494696

約数和(自身を除く): 856396

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 491, 650, 982, 1300, 1964, 2455, 4910, 6383, 9820, 12275, 12766, 24550, 25532, 31915, 49100, 63830, 127660, 159575, 319150, 638300]

約数ペア:

[(1, 638300), (2, 319150), (4, 159575), (5, 127660), (10, 63830), (13, 49100), (20, 31915), (25, 25532), (26, 24550), (50, 12766), (52, 12275), (65, 9820), (100, 6383), (130, 4910), (260, 2455), (325, 1964), (491, 1300), (650, 982)]