21205620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{117809}}^1$

素因数の和:117824

約数の個数: 36

約数和(自身を含む): 64324260

約数和(自身を除く): 43118640

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 117809, 235618, 353427, 471236, 589045, 706854, 1060281, 1178090, 1413708, 1767135, 2120562, 2356180, 3534270, 4241124, 5301405, 7068540, 10602810, 21205620]

約数ペア:

[(1, 21205620), (2, 10602810), (3, 7068540), (4, 5301405), (5, 4241124), (6, 3534270), (9, 2356180), (10, 2120562), (12, 1767135), (15, 1413708), (18, 1178090), (20, 1060281), (30, 706854), (36, 589045), (45, 471236), (60, 353427), (90, 235618), (180, 117809)]