21242860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1453}}^1$

素因数の和:1522

約数の個数: 48

約数和(自身を含む): 48365856

約数和(自身を除く): 27122996

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 43, 68, 85, 86, 170, 172, 215, 340, 430, 731, 860, 1453, 1462, 2906, 2924, 3655, 5812, 7265, 7310, 14530, 14620, 24701, 29060, 49402, 62479, 98804, 123505, 124958, 247010, 249916, 312395, 494020, 624790, 1062143, 1249580, 2124286, 4248572, 5310715, 10621430, 21242860]

約数ペア:

[(1, 21242860), (2, 10621430), (4, 5310715), (5, 4248572), (10, 2124286), (17, 1249580), (20, 1062143), (34, 624790), (43, 494020), (68, 312395), (85, 249916), (86, 247010), (170, 124958), (172, 123505), (215, 98804), (340, 62479), (430, 49402), (731, 29060), (860, 24701), (1453, 14620), (1462, 14530), (2906, 7310), (2924, 7265), (3655, 5812)]