21502020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1487}}^1$

素因数の和:1740

約数の個数: 48

約数和(自身を含む): 60496128

約数和(自身を除く): 38994108

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 241, 482, 723, 964, 1205, 1446, 1487, 2410, 2892, 2974, 3615, 4461, 4820, 5948, 7230, 7435, 8922, 14460, 14870, 17844, 22305, 29740, 44610, 89220, 358367, 716734, 1075101, 1433468, 1791835, 2150202, 3583670, 4300404, 5375505, 7167340, 10751010, 21502020]

約数ペア:

[(1, 21502020), (2, 10751010), (3, 7167340), (4, 5375505), (5, 4300404), (6, 3583670), (10, 2150202), (12, 1791835), (15, 1433468), (20, 1075101), (30, 716734), (60, 358367), (241, 89220), (482, 44610), (723, 29740), (964, 22305), (1205, 17844), (1446, 14870), (1487, 14460), (2410, 8922), (2892, 7435), (2974, 7230), (3615, 5948), (4461, 4820)]