21567780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{709}}^1$

素因数の和:750

約数の個数: 108

約数和(自身を含む): 70941780

約数和(自身を除く): 49374000

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 169, 180, 195, 234, 260, 338, 390, 468, 507, 585, 676, 709, 780, 845, 1014, 1170, 1418, 1521, 1690, 2028, 2127, 2340, 2535, 2836, 3042, 3380, 3545, 4254, 5070, 6084, 6381, 7090, 7605, 8508, 9217, 10140, 10635, 12762, 14180, 15210, 18434, 21270, 25524, 27651, 30420, 31905, 36868, 42540, 46085, 55302, 63810, 82953, 92170, 110604, 119821, 127620, 138255, 165906, 184340, 239642, 276510, 331812, 359463, 414765, 479284, 553020, 599105, 718926, 829530, 1078389, 1198210, 1437852, 1659060, 1797315, 2156778, 2396420, 3594630, 4313556, 5391945, 7189260, 10783890, 21567780]

約数ペア:

[(1, 21567780), (2, 10783890), (3, 7189260), (4, 5391945), (5, 4313556), (6, 3594630), (9, 2396420), (10, 2156778), (12, 1797315), (13, 1659060), (15, 1437852), (18, 1198210), (20, 1078389), (26, 829530), (30, 718926), (36, 599105), (39, 553020), (45, 479284), (52, 414765), (60, 359463), (65, 331812), (78, 276510), (90, 239642), (117, 184340), (130, 165906), (156, 138255), (169, 127620), (180, 119821), (195, 110604), (234, 92170), (260, 82953), (338, 63810), (390, 55302), (468, 46085), (507, 42540), (585, 36868), (676, 31905), (709, 30420), (780, 27651), (845, 25524), (1014, 21270), (1170, 18434), (1418, 15210), (1521, 14180), (1690, 12762), (2028, 10635), (2127, 10140), (2340, 9217), (2535, 8508), (2836, 7605), (3042, 7090), (3380, 6381), (3545, 6084), (4254, 5070)]