21250871828

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1\times {\mathrm{20411}}^1$

素因数の和:20744

約数の個数: 48

約数和(自身を含む): 40183553088

約数和(自身を除く): 18932681260

約数列:

[1, 2, 4, 17, 34, 61, 68, 122, 244, 251, 502, 1004, 1037, 2074, 4148, 4267, 8534, 15311, 17068, 20411, 30622, 40822, 61244, 81644, 260287, 346987, 520574, 693974, 1041148, 1245071, 1387948, 2490142, 4980284, 5123161, 10246322, 20492644, 21166207, 42332414, 84664828, 87093737, 174187474, 312512821, 348374948, 625025642, 1250051284, 5312717957, 10625435914, 21250871828]

約数ペア:

[(1, 21250871828), (2, 10625435914), (4, 5312717957), (17, 1250051284), (34, 625025642), (61, 348374948), (68, 312512821), (122, 174187474), (244, 87093737), (251, 84664828), (502, 42332414), (1004, 21166207), (1037, 20492644), (2074, 10246322), (4148, 5123161), (4267, 4980284), (8534, 2490142), (15311, 1387948), (17068, 1245071), (20411, 1041148), (30622, 693974), (40822, 520574), (61244, 346987), (81644, 260287)]