19840808

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2687}}^1$

素因数の和:2777

約数の個数: 32

約数和(自身を含む): 40642560

約数和(自身を除く): 20801752

約数列:

[1, 2, 4, 8, 13, 26, 52, 71, 104, 142, 284, 568, 923, 1846, 2687, 3692, 5374, 7384, 10748, 21496, 34931, 69862, 139724, 190777, 279448, 381554, 763108, 1526216, 2480101, 4960202, 9920404, 19840808]

約数ペア:

[(1, 19840808), (2, 9920404), (4, 4960202), (8, 2480101), (13, 1526216), (26, 763108), (52, 381554), (71, 279448), (104, 190777), (142, 139724), (284, 69862), (568, 34931), (923, 21496), (1846, 10748), (2687, 7384), (3692, 5374)]