21757790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{977}}^1$

素因数の和:1132

約数の個数: 32

約数和(自身を含む): 41827104

約数和(自身を除く): 20069314

約数列:

[1, 2, 5, 10, 17, 34, 85, 131, 170, 262, 655, 977, 1310, 1954, 2227, 4454, 4885, 9770, 11135, 16609, 22270, 33218, 83045, 127987, 166090, 255974, 639935, 1279870, 2175779, 4351558, 10878895, 21757790]

約数ペア:

[(1, 21757790), (2, 10878895), (5, 4351558), (10, 2175779), (17, 1279870), (34, 639935), (85, 255974), (131, 166090), (170, 127987), (262, 83045), (655, 33218), (977, 22270), (1310, 16609), (1954, 11135), (2227, 9770), (4454, 4885)]