21345440

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1879}}^1$

素因数の和:1965

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 29820640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1879, 2272, 2840, 3758, 5680, 7516, 9395, 11360, 15032, 18790, 30064, 37580, 60128, 75160, 133409, 150320, 266818, 300640, 533636, 667045, 1067272, 1334090, 2134544, 2668180, 4269088, 5336360, 10672720, 21345440]

約数ペア:

[(1, 21345440), (2, 10672720), (4, 5336360), (5, 4269088), (8, 2668180), (10, 2134544), (16, 1334090), (20, 1067272), (32, 667045), (40, 533636), (71, 300640), (80, 266818), (142, 150320), (160, 133409), (284, 75160), (355, 60128), (568, 37580), (710, 30064), (1136, 18790), (1420, 15032), (1879, 11360), (2272, 9395), (2840, 7516), (3758, 5680)]