20990920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30869}}^1$

素因数の和:30897

約数の個数: 32

約数和(自身を含む): 50009400

約数和(自身を除く): 29018480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30869, 61738, 123476, 154345, 246952, 308690, 524773, 617380, 1049546, 1234760, 2099092, 2623865, 4198184, 5247730, 10495460, 20990920]

約数ペア:

[(1, 20990920), (2, 10495460), (4, 5247730), (5, 4198184), (8, 2623865), (10, 2099092), (17, 1234760), (20, 1049546), (34, 617380), (40, 524773), (68, 308690), (85, 246952), (136, 154345), (170, 123476), (340, 61738), (680, 30869)]