388321778

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{53}}^2\times {\mathrm{409}}^1$

素因数の和:543

約数の個数: 36

約数和(自身を含む): 644432670

約数和(自身を除く): 256110892

約数列:

[1, 2, 13, 26, 53, 106, 169, 338, 409, 689, 818, 1378, 2809, 5317, 5618, 8957, 10634, 17914, 21677, 36517, 43354, 69121, 73034, 138242, 281801, 474721, 563602, 949442, 1148881, 2297762, 3663413, 7326826, 14935453, 29870906, 194160889, 388321778]

約数ペア:

[(1, 388321778), (2, 194160889), (13, 29870906), (26, 14935453), (53, 7326826), (106, 3663413), (169, 2297762), (338, 1148881), (409, 949442), (689, 563602), (818, 474721), (1378, 281801), (2809, 138242), (5317, 73034), (5618, 69121), (8957, 43354), (10634, 36517), (17914, 21677)]