20861260

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{3041}}^1$

素因数の和:3071

約数の個数: 48

約数和(自身を含む): 51105600

約数和(自身を除く): 30244340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3041, 3430, 6082, 6860, 12164, 15205, 21287, 30410, 42574, 60820, 85148, 106435, 149009, 212870, 298018, 425740, 596036, 745045, 1043063, 1490090, 2086126, 2980180, 4172252, 5215315, 10430630, 20861260]

約数ペア:

[(1, 20861260), (2, 10430630), (4, 5215315), (5, 4172252), (7, 2980180), (10, 2086126), (14, 1490090), (20, 1043063), (28, 745045), (35, 596036), (49, 425740), (70, 298018), (98, 212870), (140, 149009), (196, 106435), (245, 85148), (343, 60820), (490, 42574), (686, 30410), (980, 21287), (1372, 15205), (1715, 12164), (3041, 6860), (3430, 6082)]