20878040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30703}}^1$

素因数の和:30731

約数の個数: 32

約数和(自身を含む): 49740480

約数和(自身を除く): 28862440

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30703, 61406, 122812, 153515, 245624, 307030, 521951, 614060, 1043902, 1228120, 2087804, 2609755, 4175608, 5219510, 10439020, 20878040]

約数ペア:

[(1, 20878040), (2, 10439020), (4, 5219510), (5, 4175608), (8, 2609755), (10, 2087804), (17, 1228120), (20, 1043902), (34, 614060), (40, 521951), (68, 307030), (85, 245624), (136, 153515), (170, 122812), (340, 61406), (680, 30703)]