81441040

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2617}}^1$

素因数の和:3019

約数の個数: 40

約数和(自身を含む): 189909720

約数和(自身を除く): 108468680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 778, 1556, 1945, 2617, 3112, 3890, 5234, 6224, 7780, 10468, 13085, 15560, 20936, 26170, 31120, 41872, 52340, 104680, 209360, 1018013, 2036026, 4072052, 5090065, 8144104, 10180130, 16288208, 20360260, 40720520, 81441040]

約数ペア:

[(1, 81441040), (2, 40720520), (4, 20360260), (5, 16288208), (8, 10180130), (10, 8144104), (16, 5090065), (20, 4072052), (40, 2036026), (80, 1018013), (389, 209360), (778, 104680), (1556, 52340), (1945, 41872), (2617, 31120), (3112, 26170), (3890, 20936), (5234, 15560), (6224, 13085), (7780, 10468)]