20956840

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7177}}^1$

素因数の和:7261

約数の個数: 32

約数和(自身を含む): 47805480

約数和(自身を除く): 26848640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7177, 14354, 28708, 35885, 57416, 71770, 143540, 287080, 523921, 1047842, 2095684, 2619605, 4191368, 5239210, 10478420, 20956840]

約数ペア:

[(1, 20956840), (2, 10478420), (4, 5239210), (5, 4191368), (8, 2619605), (10, 2095684), (20, 1047842), (40, 523921), (73, 287080), (146, 143540), (292, 71770), (365, 57416), (584, 35885), (730, 28708), (1460, 14354), (2920, 7177)]