20911040

素因数分解:

$2^6\times 5^1\times {\mathrm{101}}^1\times {\mathrm{647}}^1$

素因数の和:765

約数の個数: 56

約数和(自身を含む): 50365152

約数和(自身を除く): 29454112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 160, 202, 320, 404, 505, 647, 808, 1010, 1294, 1616, 2020, 2588, 3232, 3235, 4040, 5176, 6464, 6470, 8080, 10352, 12940, 16160, 20704, 25880, 32320, 41408, 51760, 65347, 103520, 130694, 207040, 261388, 326735, 522776, 653470, 1045552, 1306940, 2091104, 2613880, 4182208, 5227760, 10455520, 20911040]

約数ペア:

[(1, 20911040), (2, 10455520), (4, 5227760), (5, 4182208), (8, 2613880), (10, 2091104), (16, 1306940), (20, 1045552), (32, 653470), (40, 522776), (64, 326735), (80, 261388), (101, 207040), (160, 130694), (202, 103520), (320, 65347), (404, 51760), (505, 41408), (647, 32320), (808, 25880), (1010, 20704), (1294, 16160), (1616, 12940), (2020, 10352), (2588, 8080), (3232, 6470), (3235, 6464), (4040, 5176)]