21205020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{8219}}^1$

素因数の和:8274

約数の個数: 48

約数和(自身を含む): 60762240

約数和(自身を除く): 39557220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 215, 258, 430, 516, 645, 860, 1290, 2580, 8219, 16438, 24657, 32876, 41095, 49314, 82190, 98628, 123285, 164380, 246570, 353417, 493140, 706834, 1060251, 1413668, 1767085, 2120502, 3534170, 4241004, 5301255, 7068340, 10602510, 21205020]

約数ペア:

[(1, 21205020), (2, 10602510), (3, 7068340), (4, 5301255), (5, 4241004), (6, 3534170), (10, 2120502), (12, 1767085), (15, 1413668), (20, 1060251), (30, 706834), (43, 493140), (60, 353417), (86, 246570), (129, 164380), (172, 123285), (215, 98628), (258, 82190), (430, 49314), (516, 41095), (645, 32876), (860, 24657), (1290, 16438), (2580, 8219)]