19640560

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2531}}^1$

素因数の和:2641

約数の個数: 40

約数和(自身を含む): 46153296

約数和(自身を除く): 26512736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2531, 3880, 5062, 7760, 10124, 12655, 20248, 25310, 40496, 50620, 101240, 202480, 245507, 491014, 982028, 1227535, 1964056, 2455070, 3928112, 4910140, 9820280, 19640560]

約数ペア:

[(1, 19640560), (2, 9820280), (4, 4910140), (5, 3928112), (8, 2455070), (10, 1964056), (16, 1227535), (20, 982028), (40, 491014), (80, 245507), (97, 202480), (194, 101240), (388, 50620), (485, 40496), (776, 25310), (970, 20248), (1552, 12655), (1940, 10124), (2531, 7760), (3880, 5062)]