20621811

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 32997888

約数和(自身を除く): 12376077

約数列:

[1, 3, 7, 21, 41, 43, 123, 129, 287, 301, 557, 861, 903, 1671, 1763, 3899, 5289, 11697, 12341, 22837, 23951, 37023, 68511, 71853, 159859, 167657, 479577, 502971, 981991, 2945973, 6873937, 20621811]

約数ペア:

[(1, 20621811), (3, 6873937), (7, 2945973), (21, 981991), (41, 502971), (43, 479577), (123, 167657), (129, 159859), (287, 71853), (301, 68511), (557, 37023), (861, 23951), (903, 22837), (1671, 12341), (1763, 11697), (3899, 5289)]