21064825

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{727}}^1$

素因数の和:817

約数の個数: 24

約数和(自身を含む): 27984320

約数和(自身を除く): 6919495

約数列:

[1, 5, 19, 25, 61, 95, 305, 475, 727, 1159, 1525, 3635, 5795, 13813, 18175, 28975, 44347, 69065, 221735, 345325, 842593, 1108675, 4212965, 21064825]

約数ペア:

[(1, 21064825), (5, 4212965), (19, 1108675), (25, 842593), (61, 345325), (95, 221735), (305, 69065), (475, 44347), (727, 28975), (1159, 18175), (1525, 13813), (3635, 5795)]