21712080

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6959}}^1$

素因数の和:6988

約数の個数: 80

約数和(自身を含む): 72495360

約数和(自身を除く): 50783280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6959, 13918, 20877, 27836, 34795, 41754, 55672, 69590, 83508, 90467, 104385, 111344, 139180, 167016, 180934, 208770, 271401, 278360, 334032, 361868, 417540, 452335, 542802, 556720, 723736, 835080, 904670, 1085604, 1357005, 1447472, 1670160, 1809340, 2171208, 2714010, 3618680, 4342416, 5428020, 7237360, 10856040, 21712080]

約数ペア:

[(1, 21712080), (2, 10856040), (3, 7237360), (4, 5428020), (5, 4342416), (6, 3618680), (8, 2714010), (10, 2171208), (12, 1809340), (13, 1670160), (15, 1447472), (16, 1357005), (20, 1085604), (24, 904670), (26, 835080), (30, 723736), (39, 556720), (40, 542802), (48, 452335), (52, 417540), (60, 361868), (65, 334032), (78, 278360), (80, 271401), (104, 208770), (120, 180934), (130, 167016), (156, 139180), (195, 111344), (208, 104385), (240, 90467), (260, 83508), (312, 69590), (390, 55672), (520, 41754), (624, 34795), (780, 27836), (1040, 20877), (1560, 13918), (3120, 6959)]