81635680

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{72889}}^1$

素因数の和:72911

約数の個数: 48

約数和(自身を含む): 220419360

約数和(自身を除く): 138783680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 72889, 145778, 291556, 364445, 510223, 583112, 728890, 1020446, 1166224, 1457780, 2040892, 2332448, 2551115, 2915560, 4081784, 5102230, 5831120, 8163568, 10204460, 11662240, 16327136, 20408920, 40817840, 81635680]

約数ペア:

[(1, 81635680), (2, 40817840), (4, 20408920), (5, 16327136), (7, 11662240), (8, 10204460), (10, 8163568), (14, 5831120), (16, 5102230), (20, 4081784), (28, 2915560), (32, 2551115), (35, 2332448), (40, 2040892), (56, 1457780), (70, 1166224), (80, 1020446), (112, 728890), (140, 583112), (160, 510223), (224, 364445), (280, 291556), (560, 145778), (1120, 72889)]