21206157

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{311}}^1$

素因数の和:529

約数の個数: 32

約数和(自身を含む): 34504704

約数和(自身を除く): 13298547

約数列:

[1, 3, 7, 17, 21, 51, 119, 191, 311, 357, 573, 933, 1337, 2177, 3247, 4011, 5287, 6531, 9741, 15861, 22729, 37009, 59401, 68187, 111027, 178203, 415807, 1009817, 1247421, 3029451, 7068719, 21206157]

約数ペア:

[(1, 21206157), (3, 7068719), (7, 3029451), (17, 1247421), (21, 1009817), (51, 415807), (119, 178203), (191, 111027), (311, 68187), (357, 59401), (573, 37009), (933, 22729), (1337, 15861), (2177, 9741), (3247, 6531), (4011, 5287)]