20489950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1087}}^1$

素因数の和:1141

約数の個数: 48

約数和(自身を含む): 42497280

約数和(自身を除く): 22007330

約数列:

[1, 2, 5, 10, 13, 25, 26, 29, 50, 58, 65, 130, 145, 290, 325, 377, 650, 725, 754, 1087, 1450, 1885, 2174, 3770, 5435, 9425, 10870, 14131, 18850, 27175, 28262, 31523, 54350, 63046, 70655, 141310, 157615, 315230, 353275, 409799, 706550, 788075, 819598, 1576150, 2048995, 4097990, 10244975, 20489950]

約数ペア:

[(1, 20489950), (2, 10244975), (5, 4097990), (10, 2048995), (13, 1576150), (25, 819598), (26, 788075), (29, 706550), (50, 409799), (58, 353275), (65, 315230), (130, 157615), (145, 141310), (290, 70655), (325, 63046), (377, 54350), (650, 31523), (725, 28262), (754, 27175), (1087, 18850), (1450, 14131), (1885, 10870), (2174, 9425), (3770, 5435)]