19978264

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2069}}^1$

素因数の和:2163

約数の個数: 32

約数和(自身を含む): 40240800

約数和(自身を除く): 20262536

約数列:

[1, 2, 4, 8, 17, 34, 68, 71, 136, 142, 284, 568, 1207, 2069, 2414, 4138, 4828, 8276, 9656, 16552, 35173, 70346, 140692, 146899, 281384, 293798, 587596, 1175192, 2497283, 4994566, 9989132, 19978264]

約数ペア:

[(1, 19978264), (2, 9989132), (4, 4994566), (8, 2497283), (17, 1175192), (34, 587596), (68, 293798), (71, 281384), (136, 146899), (142, 140692), (284, 70346), (568, 35173), (1207, 16552), (2069, 9656), (2414, 8276), (4138, 4828)]