21000339320

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6645677}}^1$

素因数の和:6645767

約数の個数: 32

約数和(自身を含む): 47848881600

約数和(自身を除く): 26848542280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6645677, 13291354, 26582708, 33228385, 53165416, 66456770, 132913540, 265827080, 525008483, 1050016966, 2100033932, 2625042415, 4200067864, 5250084830, 10500169660, 21000339320]

約数ペア:

[(1, 21000339320), (2, 10500169660), (4, 5250084830), (5, 4200067864), (8, 2625042415), (10, 2100033932), (20, 1050016966), (40, 525008483), (79, 265827080), (158, 132913540), (316, 66456770), (395, 53165416), (632, 33228385), (790, 26582708), (1580, 13291354), (3160, 6645677)]