21691048

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{349}}^1\times {\mathrm{457}}^1$

素因数の和:829

約数の個数: 32

約数和(自身を含む): 43281000

約数和(自身を除く): 21589952

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 349, 457, 698, 914, 1396, 1828, 2792, 3656, 5933, 7769, 11866, 15538, 23732, 31076, 47464, 62152, 159493, 318986, 637972, 1275944, 2711381, 5422762, 10845524, 21691048]

約数ペア:

[(1, 21691048), (2, 10845524), (4, 5422762), (8, 2711381), (17, 1275944), (34, 637972), (68, 318986), (136, 159493), (349, 62152), (457, 47464), (698, 31076), (914, 23732), (1396, 15538), (1828, 11866), (2792, 7769), (3656, 5933)]