19986655

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{461}}^1$

素因数の和:531

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7955105

約数列:

[1, 5, 13, 23, 29, 65, 115, 145, 299, 377, 461, 667, 1495, 1885, 2305, 3335, 5993, 8671, 10603, 13369, 29965, 43355, 53015, 66845, 137839, 173797, 307487, 689195, 868985, 1537435, 3997331, 19986655]

約数ペア:

[(1, 19986655), (5, 3997331), (13, 1537435), (23, 868985), (29, 689195), (65, 307487), (115, 173797), (145, 137839), (299, 66845), (377, 53015), (461, 43355), (667, 29965), (1495, 13369), (1885, 10603), (2305, 8671), (3335, 5993)]