21264776

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1471}}^1$

素因数の和:1629

約数の個数: 32

約数和(自身を含む): 43276800

約数和(自身を除く): 22012024

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 139, 278, 556, 1112, 1471, 1807, 2942, 3614, 5884, 7228, 11768, 14456, 19123, 38246, 76492, 152984, 204469, 408938, 817876, 1635752, 2658097, 5316194, 10632388, 21264776]

約数ペア:

[(1, 21264776), (2, 10632388), (4, 5316194), (8, 2658097), (13, 1635752), (26, 817876), (52, 408938), (104, 204469), (139, 152984), (278, 76492), (556, 38246), (1112, 19123), (1471, 14456), (1807, 11768), (2942, 7228), (3614, 5884)]