20495320

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1669}}^1$

素因数の和:1987

約数の個数: 32

約数和(自身を含む): 46292400

約数和(自身を除く): 25797080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1669, 2456, 3070, 3338, 6140, 6676, 8345, 12280, 13352, 16690, 33380, 66760, 512383, 1024766, 2049532, 2561915, 4099064, 5123830, 10247660, 20495320]

約数ペア:

[(1, 20495320), (2, 10247660), (4, 5123830), (5, 4099064), (8, 2561915), (10, 2049532), (20, 1024766), (40, 512383), (307, 66760), (614, 33380), (1228, 16690), (1535, 13352), (1669, 12280), (2456, 8345), (3070, 6676), (3338, 6140)]