20999648

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{21169}}^1$

素因数の和:21210

約数の個数: 24

約数和(自身を含む): 42678720

約数和(自身を除く): 21679072

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 248, 496, 992, 21169, 42338, 84676, 169352, 338704, 656239, 677408, 1312478, 2624956, 5249912, 10499824, 20999648]

約数ペア:

[(1, 20999648), (2, 10499824), (4, 5249912), (8, 2624956), (16, 1312478), (31, 677408), (32, 656239), (62, 338704), (124, 169352), (248, 84676), (496, 42338), (992, 21169)]