21140960

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1861}}^1$

素因数の和:1947

約数の個数: 48

約数和(自身を含む): 50676192

約数和(自身を除く): 29535232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1861, 2272, 2840, 3722, 5680, 7444, 9305, 11360, 14888, 18610, 29776, 37220, 59552, 74440, 132131, 148880, 264262, 297760, 528524, 660655, 1057048, 1321310, 2114096, 2642620, 4228192, 5285240, 10570480, 21140960]

約数ペア:

[(1, 21140960), (2, 10570480), (4, 5285240), (5, 4228192), (8, 2642620), (10, 2114096), (16, 1321310), (20, 1057048), (32, 660655), (40, 528524), (71, 297760), (80, 264262), (142, 148880), (160, 132131), (284, 74440), (355, 59552), (568, 37220), (710, 29776), (1136, 18610), (1420, 14888), (1861, 11360), (2272, 9305), (2840, 7444), (3722, 5680)]