21081496

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{379}}^1\times {\mathrm{409}}^1$

素因数の和:811

約数の個数: 32

約数和(自身を含む): 42066000

約数和(自身を除く): 20984504

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 379, 409, 758, 818, 1516, 1636, 3032, 3272, 6443, 6953, 12886, 13906, 25772, 27812, 51544, 55624, 155011, 310022, 620044, 1240088, 2635187, 5270374, 10540748, 21081496]

約数ペア:

[(1, 21081496), (2, 10540748), (4, 5270374), (8, 2635187), (17, 1240088), (34, 620044), (68, 310022), (136, 155011), (379, 55624), (409, 51544), (758, 27812), (818, 25772), (1516, 13906), (1636, 12886), (3032, 6953), (3272, 6443)]