20787776165

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{323369}}^1$

素因数の和:323453

約数の個数: 32

約数和(自身を含む): 28684212480

約数和(自身を除く): 7896436315

約数列:

[1, 5, 13, 23, 43, 65, 115, 215, 299, 559, 989, 1495, 2795, 4945, 12857, 64285, 323369, 1616845, 4203797, 7437487, 13904867, 21018985, 37187435, 69524335, 96687331, 180763271, 319811941, 483436655, 903816355, 1599059705, 4157555233, 20787776165]

約数ペア:

[(1, 20787776165), (5, 4157555233), (13, 1599059705), (23, 903816355), (43, 483436655), (65, 319811941), (115, 180763271), (215, 96687331), (299, 69524335), (559, 37187435), (989, 21018985), (1495, 13904867), (2795, 7437487), (4945, 4203797), (12857, 1616845), (64285, 323369)]