21008090

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{647}}^1$

素因数の和:862

約数の個数: 32

約数和(自身を含む): 40310784

約数和(自身を除く): 19302694

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 191, 382, 647, 955, 1294, 1910, 3235, 3247, 6470, 6494, 10999, 16235, 21998, 32470, 54995, 109990, 123577, 247154, 617885, 1235770, 2100809, 4201618, 10504045, 21008090]

約数ペア:

[(1, 21008090), (2, 10504045), (5, 4201618), (10, 2100809), (17, 1235770), (34, 617885), (85, 247154), (170, 123577), (191, 109990), (382, 54995), (647, 32470), (955, 21998), (1294, 16235), (1910, 10999), (3235, 6494), (3247, 6470)]