19908355

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 26357760

約数和(自身を除く): 6449405

約数列:

[1, 5, 29, 31, 43, 103, 145, 155, 215, 515, 899, 1247, 1333, 2987, 3193, 4429, 4495, 6235, 6665, 14935, 15965, 22145, 38657, 92597, 128441, 137299, 193285, 462985, 642205, 686495, 3981671, 19908355]

約数ペア:

[(1, 19908355), (5, 3981671), (29, 686495), (31, 642205), (43, 462985), (103, 193285), (145, 137299), (155, 128441), (215, 92597), (515, 38657), (899, 22145), (1247, 15965), (1333, 14935), (2987, 6665), (3193, 6235), (4429, 4495)]