20645191

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{397}}^1$

素因数の和:463

約数の個数: 32

約数和(自身を含む): 27509760

約数和(自身を除く): 6864569

約数列:

[1, 7, 17, 19, 23, 119, 133, 161, 323, 391, 397, 437, 2261, 2737, 2779, 3059, 6749, 7429, 7543, 9131, 47243, 52003, 52801, 63917, 128231, 155227, 173489, 897617, 1086589, 1214423, 2949313, 20645191]

約数ペア:

[(1, 20645191), (7, 2949313), (17, 1214423), (19, 1086589), (23, 897617), (119, 173489), (133, 155227), (161, 128231), (323, 63917), (391, 52801), (397, 52003), (437, 47243), (2261, 9131), (2737, 7543), (2779, 7429), (3059, 6749)]