639080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1229}}^1$

素因数の和:1253

約数の個数: 32

約数和(自身を含む): 1549800

約数和(自身を除く): 910720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1229, 2458, 4916, 6145, 9832, 12290, 15977, 24580, 31954, 49160, 63908, 79885, 127816, 159770, 319540, 639080]

約数ペア:

[(1, 639080), (2, 319540), (4, 159770), (5, 127816), (8, 79885), (10, 63908), (13, 49160), (20, 31954), (26, 24580), (40, 15977), (52, 12290), (65, 9832), (104, 6145), (130, 4916), (260, 2458), (520, 1229)]