20779772

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{6551}}^1$

素因数の和:6629

約数の個数: 24

約数和(自身を含む): 39809952

約数和(自身を除く): 19030180

約数列:

[1, 2, 4, 13, 26, 52, 61, 122, 244, 793, 1586, 3172, 6551, 13102, 26204, 85163, 170326, 340652, 399611, 799222, 1598444, 5194943, 10389886, 20779772]

約数ペア:

[(1, 20779772), (2, 10389886), (4, 5194943), (13, 1598444), (26, 799222), (52, 399611), (61, 340652), (122, 170326), (244, 85163), (793, 26204), (1586, 13102), (3172, 6551)]