20921570

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{373}}^1$

素因数の和:530

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 17854750

約数列:

[1, 2, 5, 10, 71, 79, 142, 158, 355, 373, 395, 710, 746, 790, 1865, 3730, 5609, 11218, 26483, 28045, 29467, 52966, 56090, 58934, 132415, 147335, 264830, 294670, 2092157, 4184314, 10460785, 20921570]

約数ペア:

[(1, 20921570), (2, 10460785), (5, 4184314), (10, 2092157), (71, 294670), (79, 264830), (142, 147335), (158, 132415), (355, 58934), (373, 56090), (395, 52966), (710, 29467), (746, 28045), (790, 26483), (1865, 11218), (3730, 5609)]