1211980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{787}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 3177216

約数和(自身を除く): 1965236

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 787, 1540, 1574, 3148, 3935, 5509, 7870, 8657, 11018, 15740, 17314, 22036, 27545, 34628, 43285, 55090, 60599, 86570, 110180, 121198, 173140, 242396, 302995, 605990, 1211980]

約数ペア:

[(1, 1211980), (2, 605990), (4, 302995), (5, 242396), (7, 173140), (10, 121198), (11, 110180), (14, 86570), (20, 60599), (22, 55090), (28, 43285), (35, 34628), (44, 27545), (55, 22036), (70, 17314), (77, 15740), (110, 11018), (140, 8657), (154, 7870), (220, 5509), (308, 3935), (385, 3148), (770, 1574), (787, 1540)]