18240817

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 23500800

約数和(自身を除く): 5259983

約数列:

[1, 7, 19, 23, 67, 89, 133, 161, 437, 469, 623, 1273, 1541, 1691, 2047, 3059, 5963, 8911, 10787, 11837, 14329, 29279, 38893, 41741, 113297, 137149, 204953, 272251, 793079, 960043, 2605831, 18240817]

約数ペア:

[(1, 18240817), (7, 2605831), (19, 960043), (23, 793079), (67, 272251), (89, 204953), (133, 137149), (161, 113297), (437, 41741), (469, 38893), (623, 29279), (1273, 14329), (1541, 11837), (1691, 10787), (2047, 8911), (3059, 5963)]