21719792

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{20261}}^1$

素因数の和:20336

約数の個数: 20

約数和(自身を含む): 42712296

約数和(自身を除く): 20992504

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 20261, 40522, 81044, 162088, 324176, 1357487, 2714974, 5429948, 10859896, 21719792]

約数ペア:

[(1, 21719792), (2, 10859896), (4, 5429948), (8, 2714974), (16, 1357487), (67, 324176), (134, 162088), (268, 81044), (536, 40522), (1072, 20261)]