991216

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{1511}}^1$

素因数の和:1560

約数の個数: 20

約数和(自身を含む): 1968624

約数和(自身を除く): 977408

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 1511, 3022, 6044, 12088, 24176, 61951, 123902, 247804, 495608, 991216]

約数ペア:

[(1, 991216), (2, 495608), (4, 247804), (8, 123902), (16, 61951), (41, 24176), (82, 12088), (164, 6044), (328, 3022), (656, 1511)]