20178431

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{461}}^1$

素因数の和:531

約数の個数: 24

約数和(自身を含む): 25701984

約数和(自身を除く): 5523553

約数列:

[1, 7, 13, 37, 91, 169, 259, 461, 481, 1183, 3227, 3367, 5993, 6253, 17057, 41951, 43771, 77909, 119399, 221741, 545363, 1552187, 2882633, 20178431]

約数ペア:

[(1, 20178431), (7, 2882633), (13, 1552187), (37, 545363), (91, 221741), (169, 119399), (259, 77909), (461, 43771), (481, 41951), (1183, 17057), (3227, 6253), (3367, 5993)]