20123216

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1399}}^1$

素因数の和:1467

約数の個数: 40

約数和(自身を含む): 41664000

約数和(自身を除く): 21540784

約数列:

[1, 2, 4, 8, 16, 29, 31, 58, 62, 116, 124, 232, 248, 464, 496, 899, 1399, 1798, 2798, 3596, 5596, 7192, 11192, 14384, 22384, 40571, 43369, 81142, 86738, 162284, 173476, 324568, 346952, 649136, 693904, 1257701, 2515402, 5030804, 10061608, 20123216]

約数ペア:

[(1, 20123216), (2, 10061608), (4, 5030804), (8, 2515402), (16, 1257701), (29, 693904), (31, 649136), (58, 346952), (62, 324568), (116, 173476), (124, 162284), (232, 86738), (248, 81142), (464, 43369), (496, 40571), (899, 22384), (1399, 14384), (1798, 11192), (2798, 7192), (3596, 5596)]