21360705

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{647}}^1$

素因数の和:757

約数の個数: 32

約数和(自身を含む): 35831808

約数和(自身を除く): 14471103

約数列:

[1, 3, 5, 15, 31, 71, 93, 155, 213, 355, 465, 647, 1065, 1941, 2201, 3235, 6603, 9705, 11005, 20057, 33015, 45937, 60171, 100285, 137811, 229685, 300855, 689055, 1424047, 4272141, 7120235, 21360705]

約数ペア:

[(1, 21360705), (3, 7120235), (5, 4272141), (15, 1424047), (31, 689055), (71, 300855), (93, 229685), (155, 137811), (213, 100285), (355, 60171), (465, 45937), (647, 33015), (1065, 20057), (1941, 11005), (2201, 9705), (3235, 6603)]