9920

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1$

素因数の和:48

約数の個数: 28

約数和(自身を含む): 24384

約数和(自身を除く): 14464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920]

約数ペア:

[(1, 9920), (2, 4960), (4, 2480), (5, 1984), (8, 1240), (10, 992), (16, 620), (20, 496), (31, 320), (32, 310), (40, 248), (62, 160), (64, 155), (80, 124)]