21006990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2311}}^1$

素因数の和:2425

約数の個数: 48

約数和(自身を含む): 55182816

約数和(自身を除く): 34175826

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 101, 202, 303, 505, 606, 909, 1010, 1515, 1818, 2311, 3030, 4545, 4622, 6933, 9090, 11555, 13866, 20799, 23110, 34665, 41598, 69330, 103995, 207990, 233411, 466822, 700233, 1167055, 1400466, 2100699, 2334110, 3501165, 4201398, 7002330, 10503495, 21006990]

約数ペア:

[(1, 21006990), (2, 10503495), (3, 7002330), (5, 4201398), (6, 3501165), (9, 2334110), (10, 2100699), (15, 1400466), (18, 1167055), (30, 700233), (45, 466822), (90, 233411), (101, 207990), (202, 103995), (303, 69330), (505, 41598), (606, 34665), (909, 23110), (1010, 20799), (1515, 13866), (1818, 11555), (2311, 9090), (3030, 6933), (4545, 4622)]