21146540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{367}}^1$

素因数の和:486

約数の個数: 48

約数和(自身を含む): 46244352

約数和(自身を除く): 25097812

約数列:

[1, 2, 4, 5, 10, 20, 43, 67, 86, 134, 172, 215, 268, 335, 367, 430, 670, 734, 860, 1340, 1468, 1835, 2881, 3670, 5762, 7340, 11524, 14405, 15781, 24589, 28810, 31562, 49178, 57620, 63124, 78905, 98356, 122945, 157810, 245890, 315620, 491780, 1057327, 2114654, 4229308, 5286635, 10573270, 21146540]

約数ペア:

[(1, 21146540), (2, 10573270), (4, 5286635), (5, 4229308), (10, 2114654), (20, 1057327), (43, 491780), (67, 315620), (86, 245890), (134, 157810), (172, 122945), (215, 98356), (268, 78905), (335, 63124), (367, 57620), (430, 49178), (670, 31562), (734, 28810), (860, 24589), (1340, 15781), (1468, 14405), (1835, 11524), (2881, 7340), (3670, 5762)]