20498765

素因数分解:

$5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 29154816

約数和(自身を除く): 8656051

約数列:

[1, 5, 7, 35, 71, 73, 113, 355, 365, 497, 511, 565, 791, 2485, 2555, 3955, 5183, 8023, 8249, 25915, 36281, 40115, 41245, 56161, 57743, 181405, 280805, 288715, 585679, 2928395, 4099753, 20498765]

約数ペア:

[(1, 20498765), (5, 4099753), (7, 2928395), (35, 585679), (71, 288715), (73, 280805), (113, 181405), (355, 57743), (365, 56161), (497, 41245), (511, 40115), (565, 36281), (791, 25915), (2485, 8249), (2555, 8023), (3955, 5183)]