21097960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{3121}}^1$

素因数の和:3158

約数の個数: 48

約数和(自身を含む): 51419340

約数和(自身を除く): 30321380

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 3121, 3380, 6242, 6760, 12484, 15605, 24968, 31210, 40573, 62420, 81146, 124840, 162292, 202865, 324584, 405730, 527449, 811460, 1054898, 1622920, 2109796, 2637245, 4219592, 5274490, 10548980, 21097960]

約数ペア:

[(1, 21097960), (2, 10548980), (4, 5274490), (5, 4219592), (8, 2637245), (10, 2109796), (13, 1622920), (20, 1054898), (26, 811460), (40, 527449), (52, 405730), (65, 324584), (104, 202865), (130, 162292), (169, 124840), (260, 81146), (338, 62420), (520, 40573), (676, 31210), (845, 24968), (1352, 15605), (1690, 12484), (3121, 6760), (3380, 6242)]