21897320

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{439}}^1$

素因数の和:522

約数の個数: 64

約数和(自身を含む): 52272000

約数和(自身を除く): 30374680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 43, 58, 86, 116, 145, 172, 215, 232, 290, 344, 430, 439, 580, 860, 878, 1160, 1247, 1720, 1756, 2195, 2494, 3512, 4390, 4988, 6235, 8780, 9976, 12470, 12731, 17560, 18877, 24940, 25462, 37754, 49880, 50924, 63655, 75508, 94385, 101848, 127310, 151016, 188770, 254620, 377540, 509240, 547433, 755080, 1094866, 2189732, 2737165, 4379464, 5474330, 10948660, 21897320]

約数ペア:

[(1, 21897320), (2, 10948660), (4, 5474330), (5, 4379464), (8, 2737165), (10, 2189732), (20, 1094866), (29, 755080), (40, 547433), (43, 509240), (58, 377540), (86, 254620), (116, 188770), (145, 151016), (172, 127310), (215, 101848), (232, 94385), (290, 75508), (344, 63655), (430, 50924), (439, 49880), (580, 37754), (860, 25462), (878, 24940), (1160, 18877), (1247, 17560), (1720, 12731), (1756, 12470), (2195, 9976), (2494, 8780), (3512, 6235), (4390, 4988)]