21790223

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:431

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7240177

約数列:

[1, 7, 13, 23, 29, 91, 161, 203, 299, 359, 377, 667, 2093, 2513, 2639, 4667, 4669, 8257, 8671, 10411, 32669, 57799, 60697, 72877, 107341, 135343, 239453, 751387, 947401, 1676171, 3112889, 21790223]

約数ペア:

[(1, 21790223), (7, 3112889), (13, 1676171), (23, 947401), (29, 751387), (91, 239453), (161, 135343), (203, 107341), (299, 72877), (359, 60697), (377, 57799), (667, 32669), (2093, 10411), (2513, 8671), (2639, 8257), (4667, 4669)]