20492872

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{331}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 39441600

約数和(自身を除く): 18948728

約数列:

[1, 2, 4, 8, 71, 109, 142, 218, 284, 331, 436, 568, 662, 872, 1324, 2648, 7739, 15478, 23501, 30956, 36079, 47002, 61912, 72158, 94004, 144316, 188008, 288632, 2561609, 5123218, 10246436, 20492872]

約数ペア:

[(1, 20492872), (2, 10246436), (4, 5123218), (8, 2561609), (71, 288632), (109, 188008), (142, 144316), (218, 94004), (284, 72158), (331, 61912), (436, 47002), (568, 36079), (662, 30956), (872, 23501), (1324, 15478), (2648, 7739)]