21988897

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 27086400

約数和(自身を除く): 5097503

約数列:

[1, 7, 23, 49, 109, 161, 179, 763, 1127, 1253, 2507, 4117, 5341, 8771, 17549, 19511, 28819, 122843, 136577, 201733, 448753, 956039, 3141271, 21988897]

約数ペア:

[(1, 21988897), (7, 3141271), (23, 956039), (49, 448753), (109, 201733), (161, 136577), (179, 122843), (763, 28819), (1127, 19511), (1253, 17549), (2507, 8771), (4117, 5341)]