399217555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1\times {\mathrm{787}}^1$

素因数の和:1227

約数の個数: 32

約数和(自身を含む): 547388928

約数和(自身を除く): 148171373

約数列:

[1, 5, 11, 23, 55, 115, 253, 401, 787, 1265, 2005, 3935, 4411, 8657, 9223, 18101, 22055, 43285, 46115, 90505, 101453, 199111, 315587, 507265, 995555, 1577935, 3471457, 7258501, 17357285, 36292505, 79843511, 399217555]

約数ペア:

[(1, 399217555), (5, 79843511), (11, 36292505), (23, 17357285), (55, 7258501), (115, 3471457), (253, 1577935), (401, 995555), (787, 507265), (1265, 315587), (2005, 199111), (3935, 101453), (4411, 90505), (8657, 46115), (9223, 43285), (18101, 22055)]