19882009

素因数分解:

$7^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{229}}^1$

素因数の和:472

約数の個数: 16

約数和(自身を含む): 23257600

約数和(自身を除く): 3375591

約数列:

[1, 7, 79, 157, 229, 553, 1099, 1603, 12403, 18091, 35953, 86821, 126637, 251671, 2840287, 19882009]

約数ペア:

[(1, 19882009), (7, 2840287), (79, 251671), (157, 126637), (229, 86821), (553, 35953), (1099, 18091), (1603, 12403)]