21005010

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{1381}}^1$

素因数の和:1420

約数の個数: 72

約数和(自身を含む): 59180004

約数和(自身を除く): 38174994

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 169, 195, 234, 338, 390, 507, 585, 845, 1014, 1170, 1381, 1521, 1690, 2535, 2762, 3042, 4143, 5070, 6905, 7605, 8286, 12429, 13810, 15210, 17953, 20715, 24858, 35906, 41430, 53859, 62145, 89765, 107718, 124290, 161577, 179530, 233389, 269295, 323154, 466778, 538590, 700167, 807885, 1166945, 1400334, 1615770, 2100501, 2333890, 3500835, 4201002, 7001670, 10502505, 21005010]

約数ペア:

[(1, 21005010), (2, 10502505), (3, 7001670), (5, 4201002), (6, 3500835), (9, 2333890), (10, 2100501), (13, 1615770), (15, 1400334), (18, 1166945), (26, 807885), (30, 700167), (39, 538590), (45, 466778), (65, 323154), (78, 269295), (90, 233389), (117, 179530), (130, 161577), (169, 124290), (195, 107718), (234, 89765), (338, 62145), (390, 53859), (507, 41430), (585, 35906), (845, 24858), (1014, 20715), (1170, 17953), (1381, 15210), (1521, 13810), (1690, 12429), (2535, 8286), (2762, 7605), (3042, 6905), (4143, 5070)]