21209604

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1721}}^1$

素因数の和:1820

約数の個数: 48

約数和(自身を含む): 54001920

約数和(自身を除く): 32792316

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 79, 156, 158, 237, 316, 474, 948, 1027, 1721, 2054, 3081, 3442, 4108, 5163, 6162, 6884, 10326, 12324, 20652, 22373, 44746, 67119, 89492, 134238, 135959, 268476, 271918, 407877, 543836, 815754, 1631508, 1767467, 3534934, 5302401, 7069868, 10604802, 21209604]

約数ペア:

[(1, 21209604), (2, 10604802), (3, 7069868), (4, 5302401), (6, 3534934), (12, 1767467), (13, 1631508), (26, 815754), (39, 543836), (52, 407877), (78, 271918), (79, 268476), (156, 135959), (158, 134238), (237, 89492), (316, 67119), (474, 44746), (948, 22373), (1027, 20652), (1721, 12324), (2054, 10326), (3081, 6884), (3442, 6162), (4108, 5163)]