81477520

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{9013}}^1$

素因数の和:9139

約数の個数: 40

約数和(自身を含む): 191132856

約数和(自身を除く): 109655336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 4520, 9013, 9040, 18026, 36052, 45065, 72104, 90130, 144208, 180260, 360520, 721040, 1018469, 2036938, 4073876, 5092345, 8147752, 10184690, 16295504, 20369380, 40738760, 81477520]

約数ペア:

[(1, 81477520), (2, 40738760), (4, 20369380), (5, 16295504), (8, 10184690), (10, 8147752), (16, 5092345), (20, 4073876), (40, 2036938), (80, 1018469), (113, 721040), (226, 360520), (452, 180260), (565, 144208), (904, 90130), (1130, 72104), (1808, 45065), (2260, 36052), (4520, 18026), (9013, 9040)]