21211240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31193}}^1$

素因数の和:31221

約数の個数: 32

約数和(自身を含む): 50534280

約数和(自身を除く): 29323040

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31193, 62386, 124772, 155965, 249544, 311930, 530281, 623860, 1060562, 1247720, 2121124, 2651405, 4242248, 5302810, 10605620, 21211240]

約数ペア:

[(1, 21211240), (2, 10605620), (4, 5302810), (5, 4242248), (8, 2651405), (10, 2121124), (17, 1247720), (20, 1060562), (34, 623860), (40, 530281), (68, 311930), (85, 249544), (136, 155965), (170, 124772), (340, 62386), (680, 31193)]