201220420

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{15647}}^1$

素因数の和:16299

約数の個数: 24

約数和(自身を含む): 423247104

約数和(自身を除く): 222026684

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6430, 12860, 15647, 31294, 62588, 78235, 156470, 312940, 10061021, 20122042, 40244084, 50305105, 100610210, 201220420]

約数ペア:

[(1, 201220420), (2, 100610210), (4, 50305105), (5, 40244084), (10, 20122042), (20, 10061021), (643, 312940), (1286, 156470), (2572, 78235), (3215, 62588), (6430, 31294), (12860, 15647)]