81734360

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{5147}}^1$

素因数の和:5555

約数の個数: 32

約数和(自身を含む): 184401360

約数和(自身を除く): 102667000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 5147, 7940, 10294, 15880, 20588, 25735, 41176, 51470, 102940, 205880, 2043359, 4086718, 8173436, 10216795, 16346872, 20433590, 40867180, 81734360]

約数ペア:

[(1, 81734360), (2, 40867180), (4, 20433590), (5, 16346872), (8, 10216795), (10, 8173436), (20, 4086718), (40, 2043359), (397, 205880), (794, 102940), (1588, 51470), (1985, 41176), (3176, 25735), (3970, 20588), (5147, 15880), (7940, 10294)]