21446690

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:263

約数の個数: 48

約数和(自身を含む): 42240744

約数和(自身を除く): 20794054

約数列:

[1, 2, 5, 10, 17, 34, 41, 82, 85, 170, 181, 205, 289, 362, 410, 578, 697, 905, 1394, 1445, 1810, 2890, 3077, 3485, 6154, 6970, 7421, 11849, 14842, 15385, 23698, 30770, 37105, 52309, 59245, 74210, 104618, 118490, 126157, 252314, 261545, 523090, 630785, 1261570, 2144669, 4289338, 10723345, 21446690]

約数ペア:

[(1, 21446690), (2, 10723345), (5, 4289338), (10, 2144669), (17, 1261570), (34, 630785), (41, 523090), (82, 261545), (85, 252314), (170, 126157), (181, 118490), (205, 104618), (289, 74210), (362, 59245), (410, 52309), (578, 37105), (697, 30770), (905, 23698), (1394, 15385), (1445, 14842), (1810, 11849), (2890, 7421), (3077, 6970), (3485, 6154)]