21264828

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{503}}^1$

素因数の和:794

約数の個数: 48

約数和(自身を含む): 53738496

約数和(自身を除く): 32473668

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 271, 503, 542, 813, 1006, 1084, 1509, 1626, 2012, 3018, 3252, 3523, 6036, 6539, 7046, 10569, 13078, 14092, 19617, 21138, 26156, 39234, 42276, 78468, 136313, 272626, 408939, 545252, 817878, 1635756, 1772069, 3544138, 5316207, 7088276, 10632414, 21264828]

約数ペア:

[(1, 21264828), (2, 10632414), (3, 7088276), (4, 5316207), (6, 3544138), (12, 1772069), (13, 1635756), (26, 817878), (39, 545252), (52, 408939), (78, 272626), (156, 136313), (271, 78468), (503, 42276), (542, 39234), (813, 26156), (1006, 21138), (1084, 19617), (1509, 14092), (1626, 13078), (2012, 10569), (3018, 7046), (3252, 6539), (3523, 6036)]