21946561

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:421

約数の個数: 24

約数和(自身を含む): 27808704

約数和(自身を除く): 5862143

約数列:

[1, 7, 13, 49, 91, 131, 263, 637, 917, 1703, 1841, 3419, 6419, 11921, 12887, 23933, 34453, 83447, 167531, 241171, 447889, 1688197, 3135223, 21946561]

約数ペア:

[(1, 21946561), (7, 3135223), (13, 1688197), (49, 447889), (91, 241171), (131, 167531), (263, 83447), (637, 34453), (917, 23933), (1703, 12887), (1841, 11921), (3419, 6419)]