21737380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{541}}^1$

素因数の和:605

約数の個数: 72

約数和(自身を含む): 54497016

約数和(自身を除く): 32759636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 541, 574, 820, 980, 1082, 1148, 1435, 2009, 2164, 2705, 2870, 3787, 4018, 5410, 5740, 7574, 8036, 10045, 10820, 15148, 18935, 20090, 22181, 26509, 37870, 40180, 44362, 53018, 75740, 88724, 106036, 110905, 132545, 155267, 221810, 265090, 310534, 443620, 530180, 621068, 776335, 1086869, 1552670, 2173738, 3105340, 4347476, 5434345, 10868690, 21737380]

約数ペア:

[(1, 21737380), (2, 10868690), (4, 5434345), (5, 4347476), (7, 3105340), (10, 2173738), (14, 1552670), (20, 1086869), (28, 776335), (35, 621068), (41, 530180), (49, 443620), (70, 310534), (82, 265090), (98, 221810), (140, 155267), (164, 132545), (196, 110905), (205, 106036), (245, 88724), (287, 75740), (410, 53018), (490, 44362), (541, 40180), (574, 37870), (820, 26509), (980, 22181), (1082, 20090), (1148, 18935), (1435, 15148), (2009, 10820), (2164, 10045), (2705, 8036), (2870, 7574), (3787, 5740), (4018, 5410)]