12965980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 28980000

約数和(自身を除く): 16014020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 149, 190, 229, 298, 380, 458, 596, 745, 916, 1145, 1490, 2290, 2831, 2980, 4351, 4580, 5662, 8702, 11324, 14155, 17404, 21755, 28310, 34121, 43510, 56620, 68242, 87020, 136484, 170605, 341210, 648299, 682420, 1296598, 2593196, 3241495, 6482990, 12965980]

約数ペア:

[(1, 12965980), (2, 6482990), (4, 3241495), (5, 2593196), (10, 1296598), (19, 682420), (20, 648299), (38, 341210), (76, 170605), (95, 136484), (149, 87020), (190, 68242), (229, 56620), (298, 43510), (380, 34121), (458, 28310), (596, 21755), (745, 17404), (916, 14155), (1145, 11324), (1490, 8702), (2290, 5662), (2831, 4580), (2980, 4351)]