21868715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1231}}^1$

素因数の和:1283

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10064725

約数列:

[1, 5, 11, 17, 19, 55, 85, 95, 187, 209, 323, 935, 1045, 1231, 1615, 3553, 6155, 13541, 17765, 20927, 23389, 67705, 104635, 116945, 230197, 257279, 397613, 1150985, 1286395, 1988065, 4373743, 21868715]

約数ペア:

[(1, 21868715), (5, 4373743), (11, 1988065), (17, 1286395), (19, 1150985), (55, 397613), (85, 257279), (95, 230197), (187, 116945), (209, 104635), (323, 67705), (935, 23389), (1045, 20927), (1231, 17765), (1615, 13541), (3553, 6155)]