21728810

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 40176000

約数和(自身を除く): 18447190

約数列:

[1, 2, 5, 10, 61, 122, 179, 199, 305, 358, 398, 610, 895, 995, 1790, 1990, 10919, 12139, 21838, 24278, 35621, 54595, 60695, 71242, 109190, 121390, 178105, 356210, 2172881, 4345762, 10864405, 21728810]

約数ペア:

[(1, 21728810), (2, 10864405), (5, 4345762), (10, 2172881), (61, 356210), (122, 178105), (179, 121390), (199, 109190), (305, 71242), (358, 60695), (398, 54595), (610, 35621), (895, 24278), (995, 21838), (1790, 12139), (1990, 10919)]