21921040

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2713}}^1$

素因数の和:2827

約数の個数: 40

約数和(自身を含む): 51490008

約数和(自身を除く): 29568968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2713, 4040, 5426, 8080, 10852, 13565, 21704, 27130, 43408, 54260, 108520, 217040, 274013, 548026, 1096052, 1370065, 2192104, 2740130, 4384208, 5480260, 10960520, 21921040]

約数ペア:

[(1, 21921040), (2, 10960520), (4, 5480260), (5, 4384208), (8, 2740130), (10, 2192104), (16, 1370065), (20, 1096052), (40, 548026), (80, 274013), (101, 217040), (202, 108520), (404, 54260), (505, 43408), (808, 27130), (1010, 21704), (1616, 13565), (2020, 10852), (2713, 8080), (4040, 5426)]