12865840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 32810400

約数和(自身を除く): 19944560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 139, 178, 208, 260, 278, 356, 445, 520, 556, 695, 712, 890, 1040, 1112, 1157, 1390, 1424, 1780, 1807, 2224, 2314, 2780, 3560, 3614, 4628, 5560, 5785, 7120, 7228, 9035, 9256, 11120, 11570, 12371, 14456, 18070, 18512, 23140, 24742, 28912, 36140, 46280, 49484, 61855, 72280, 92560, 98968, 123710, 144560, 160823, 197936, 247420, 321646, 494840, 643292, 804115, 989680, 1286584, 1608230, 2573168, 3216460, 6432920, 12865840]

約数ペア:

[(1, 12865840), (2, 6432920), (4, 3216460), (5, 2573168), (8, 1608230), (10, 1286584), (13, 989680), (16, 804115), (20, 643292), (26, 494840), (40, 321646), (52, 247420), (65, 197936), (80, 160823), (89, 144560), (104, 123710), (130, 98968), (139, 92560), (178, 72280), (208, 61855), (260, 49484), (278, 46280), (356, 36140), (445, 28912), (520, 24742), (556, 23140), (695, 18512), (712, 18070), (890, 14456), (1040, 12371), (1112, 11570), (1157, 11120), (1390, 9256), (1424, 9035), (1780, 7228), (1807, 7120), (2224, 5785), (2314, 5560), (2780, 4628), (3560, 3614)]