28207420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{82963}}^1$

素因数の和:82989

約数の個数: 24

約数和(自身を含む): 62720784

約数和(自身を除く): 34513364

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 82963, 165926, 331852, 414815, 829630, 1410371, 1659260, 2820742, 5641484, 7051855, 14103710, 28207420]

約数ペア:

[(1, 28207420), (2, 14103710), (4, 7051855), (5, 5641484), (10, 2820742), (17, 1659260), (20, 1410371), (34, 829630), (68, 414815), (85, 331852), (170, 165926), (340, 82963)]