21651279

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{479}}^1$

素因数の和:575

約数の個数: 32

約数和(自身を含む): 33331200

約数和(自身を除く): 11679921

約数列:

[1, 3, 13, 19, 39, 57, 61, 183, 247, 479, 741, 793, 1159, 1437, 2379, 3477, 6227, 9101, 15067, 18681, 27303, 29219, 45201, 87657, 118313, 354939, 379847, 555161, 1139541, 1665483, 7217093, 21651279]

約数ペア:

[(1, 21651279), (3, 7217093), (13, 1665483), (19, 1139541), (39, 555161), (57, 379847), (61, 354939), (183, 118313), (247, 87657), (479, 45201), (741, 29219), (793, 27303), (1159, 18681), (1437, 15067), (2379, 9101), (3477, 6227)]