20717890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1\times {\mathrm{359}}^1$

素因数の和:594

約数の個数: 32

約数和(自身を含む): 38880000

約数和(自身を除く): 18162110

約数列:

[1, 2, 5, 10, 29, 58, 145, 199, 290, 359, 398, 718, 995, 1795, 1990, 3590, 5771, 10411, 11542, 20822, 28855, 52055, 57710, 71441, 104110, 142882, 357205, 714410, 2071789, 4143578, 10358945, 20717890]

約数ペア:

[(1, 20717890), (2, 10358945), (5, 4143578), (10, 2071789), (29, 714410), (58, 357205), (145, 142882), (199, 104110), (290, 71441), (359, 57710), (398, 52055), (718, 28855), (995, 20822), (1795, 11542), (1990, 10411), (3590, 5771)]