21288260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{2083}}^1$

素因数の和:2172

約数の個数: 48

約数和(自身を含む): 51816576

約数和(自身を除く): 30528316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 73, 140, 146, 292, 365, 511, 730, 1022, 1460, 2044, 2083, 2555, 4166, 5110, 8332, 10220, 10415, 14581, 20830, 29162, 41660, 58324, 72905, 145810, 152059, 291620, 304118, 608236, 760295, 1064413, 1520590, 2128826, 3041180, 4257652, 5322065, 10644130, 21288260]

約数ペア:

[(1, 21288260), (2, 10644130), (4, 5322065), (5, 4257652), (7, 3041180), (10, 2128826), (14, 1520590), (20, 1064413), (28, 760295), (35, 608236), (70, 304118), (73, 291620), (140, 152059), (146, 145810), (292, 72905), (365, 58324), (511, 41660), (730, 29162), (1022, 20830), (1460, 14581), (2044, 10415), (2083, 10220), (2555, 8332), (4166, 5110)]