18840913

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1$

素因数の和:697

約数の個数: 32

約数和(自身を含む): 25885440

約数和(自身を除く): 7044527

約数列:

[1, 7, 13, 17, 19, 91, 119, 133, 221, 247, 323, 641, 1547, 1729, 2261, 4199, 4487, 8333, 10897, 12179, 29393, 58331, 76279, 85253, 141661, 158327, 207043, 991627, 1108289, 1449301, 2691559, 18840913]

約数ペア:

[(1, 18840913), (7, 2691559), (13, 1449301), (17, 1108289), (19, 991627), (91, 207043), (119, 158327), (133, 141661), (221, 85253), (247, 76279), (323, 58331), (641, 29393), (1547, 12179), (1729, 10897), (2261, 8333), (4199, 4487)]