21491380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26209}}^1$

素因数の和:26259

約数の個数: 24

約数和(自身を含む): 46234440

約数和(自身を除く): 24743060

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26209, 52418, 104836, 131045, 262090, 524180, 1074569, 2149138, 4298276, 5372845, 10745690, 21491380]

約数ペア:

[(1, 21491380), (2, 10745690), (4, 5372845), (5, 4298276), (10, 2149138), (20, 1074569), (41, 524180), (82, 262090), (164, 131045), (205, 104836), (410, 52418), (820, 26209)]