21391468

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 44450560

約数和(自身を除く): 23059092

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 109, 163, 172, 218, 301, 326, 436, 602, 652, 763, 1141, 1204, 1526, 2282, 3052, 4564, 4687, 7009, 9374, 14018, 17767, 18748, 28036, 32809, 35534, 49063, 65618, 71068, 98126, 124369, 131236, 196252, 248738, 497476, 763981, 1527962, 3055924, 5347867, 10695734, 21391468]

約数ペア:

[(1, 21391468), (2, 10695734), (4, 5347867), (7, 3055924), (14, 1527962), (28, 763981), (43, 497476), (86, 248738), (109, 196252), (163, 131236), (172, 124369), (218, 98126), (301, 71068), (326, 65618), (436, 49063), (602, 35534), (652, 32809), (763, 28036), (1141, 18748), (1204, 17767), (1526, 14018), (2282, 9374), (3052, 7009), (4564, 4687)]