20176760

素因数分解:

$2^3\times 5^1\times {\mathrm{509}}^1\times {\mathrm{991}}^1$

素因数の和:1511

約数の個数: 32

約数和(自身を含む): 45532800

約数和(自身を除く): 25356040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509, 991, 1018, 1982, 2036, 2545, 3964, 4072, 4955, 5090, 7928, 9910, 10180, 19820, 20360, 39640, 504419, 1008838, 2017676, 2522095, 4035352, 5044190, 10088380, 20176760]

約数ペア:

[(1, 20176760), (2, 10088380), (4, 5044190), (5, 4035352), (8, 2522095), (10, 2017676), (20, 1008838), (40, 504419), (509, 39640), (991, 20360), (1018, 19820), (1982, 10180), (2036, 9910), (2545, 7928), (3964, 5090), (4072, 4955)]