21856390

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{1549}}^1$

素因数の和:1656

約数の個数: 32

約数和(自身を含む): 42184800

約数和(自身を除く): 20328410

約数列:

[1, 2, 5, 10, 17, 34, 83, 85, 166, 170, 415, 830, 1411, 1549, 2822, 3098, 7055, 7745, 14110, 15490, 26333, 52666, 128567, 131665, 257134, 263330, 642835, 1285670, 2185639, 4371278, 10928195, 21856390]

約数ペア:

[(1, 21856390), (2, 10928195), (5, 4371278), (10, 2185639), (17, 1285670), (34, 642835), (83, 263330), (85, 257134), (166, 131665), (170, 128567), (415, 52666), (830, 26333), (1411, 15490), (1549, 14110), (2822, 7745), (3098, 7055)]