21425420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{991}}^1$

素因数の和:1070

約数の個数: 48

約数和(自身を含む): 47996928

約数和(自身を除く): 26571508

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 940, 991, 1081, 1982, 2162, 3964, 4324, 4955, 5405, 9910, 10810, 19820, 21620, 22793, 45586, 46577, 91172, 93154, 113965, 186308, 227930, 232885, 455860, 465770, 931540, 1071271, 2142542, 4285084, 5356355, 10712710, 21425420]

約数ペア:

[(1, 21425420), (2, 10712710), (4, 5356355), (5, 4285084), (10, 2142542), (20, 1071271), (23, 931540), (46, 465770), (47, 455860), (92, 232885), (94, 227930), (115, 186308), (188, 113965), (230, 93154), (235, 91172), (460, 46577), (470, 45586), (940, 22793), (991, 21620), (1081, 19820), (1982, 10810), (2162, 9910), (3964, 5405), (4324, 4955)]