21675913

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 27574272

約数和(自身を除く): 5898359

約数列:

[1, 7, 23, 31, 43, 101, 161, 217, 301, 707, 713, 989, 1333, 2323, 3131, 4343, 4991, 6923, 9331, 16261, 21917, 30401, 30659, 72013, 99889, 134633, 214613, 504091, 699223, 942431, 3096559, 21675913]

約数ペア:

[(1, 21675913), (7, 3096559), (23, 942431), (31, 699223), (43, 504091), (101, 214613), (161, 134633), (217, 99889), (301, 72013), (707, 30659), (713, 30401), (989, 21917), (1333, 16261), (2323, 9331), (3131, 6923), (4343, 4991)]