991995985

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{1459}}^1$

素因数の和:1921

約数の個数: 32

約数和(自身を含む): 1330819200

約数和(自身を除く): 338823215

約数列:

[1, 5, 17, 19, 85, 95, 323, 421, 1459, 1615, 2105, 7157, 7295, 7999, 24803, 27721, 35785, 39995, 124015, 135983, 138605, 471257, 614239, 679915, 2356285, 3071195, 10442063, 11670541, 52210315, 58352705, 198399197, 991995985]

約数ペア:

[(1, 991995985), (5, 198399197), (17, 58352705), (19, 52210315), (85, 11670541), (95, 10442063), (323, 3071195), (421, 2356285), (1459, 679915), (1615, 614239), (2105, 471257), (7157, 138605), (7295, 135983), (7999, 124015), (24803, 39995), (27721, 35785)]