19992635

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 7683013

約数列:

[1, 5, 13, 23, 43, 65, 115, 215, 299, 311, 559, 989, 1495, 1555, 2795, 4043, 4945, 7153, 12857, 13373, 20215, 35765, 64285, 66865, 92989, 173849, 307579, 464945, 869245, 1537895, 3998527, 19992635]

約数ペア:

[(1, 19992635), (5, 3998527), (13, 1537895), (23, 869245), (43, 464945), (65, 307579), (115, 173849), (215, 92989), (299, 66865), (311, 64285), (559, 35765), (989, 20215), (1495, 13373), (1555, 12857), (2795, 7153), (4043, 4945)]