19509140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{421}}^1$

素因数の和:768

約数の個数: 48

約数和(自身を含む): 47074944

約数和(自身を除く): 27565804

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 421, 662, 842, 1324, 1655, 1684, 2105, 2317, 2947, 3310, 4210, 4634, 5894, 6620, 8420, 9268, 11585, 11788, 14735, 23170, 29470, 46340, 58940, 139351, 278702, 557404, 696755, 975457, 1393510, 1950914, 2787020, 3901828, 4877285, 9754570, 19509140]

約数ペア:

[(1, 19509140), (2, 9754570), (4, 4877285), (5, 3901828), (7, 2787020), (10, 1950914), (14, 1393510), (20, 975457), (28, 696755), (35, 557404), (70, 278702), (140, 139351), (331, 58940), (421, 46340), (662, 29470), (842, 23170), (1324, 14735), (1655, 11788), (1684, 11585), (2105, 9268), (2317, 8420), (2947, 6620), (3310, 5894), (4210, 4634)]