21386040

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13709}}^1$

素因数の和:13736

約数の個数: 64

約数和(自身を含む): 69098400

約数和(自身を除く): 47712360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13709, 27418, 41127, 54836, 68545, 82254, 109672, 137090, 164508, 178217, 205635, 274180, 329016, 356434, 411270, 534651, 548360, 712868, 822540, 891085, 1069302, 1425736, 1645080, 1782170, 2138604, 2673255, 3564340, 4277208, 5346510, 7128680, 10693020, 21386040]

約数ペア:

[(1, 21386040), (2, 10693020), (3, 7128680), (4, 5346510), (5, 4277208), (6, 3564340), (8, 2673255), (10, 2138604), (12, 1782170), (13, 1645080), (15, 1425736), (20, 1069302), (24, 891085), (26, 822540), (30, 712868), (39, 548360), (40, 534651), (52, 411270), (60, 356434), (65, 329016), (78, 274180), (104, 205635), (120, 178217), (130, 164508), (156, 137090), (195, 109672), (260, 82254), (312, 68545), (390, 54836), (520, 41127), (780, 27418), (1560, 13709)]