21871775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{971}}^1$

素因数の和:1051

約数の個数: 24

約数和(自身を含む): 29288304

約数和(自身を除く): 7416529

約数列:

[1, 5, 17, 25, 53, 85, 265, 425, 901, 971, 1325, 4505, 4855, 16507, 22525, 24275, 51463, 82535, 257315, 412675, 874871, 1286575, 4374355, 21871775]

約数ペア:

[(1, 21871775), (5, 4374355), (17, 1286575), (25, 874871), (53, 412675), (85, 257315), (265, 82535), (425, 51463), (901, 24275), (971, 22525), (1325, 16507), (4505, 4855)]