20983900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{967}}^1$

素因数の和:1019

約数の個数: 72

約数和(自身を含む): 53774336

約数和(自身を除く): 32790436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 967, 1085, 1550, 1934, 2170, 3100, 3868, 4340, 4835, 5425, 6769, 9670, 10850, 13538, 19340, 21700, 24175, 27076, 29977, 33845, 48350, 59954, 67690, 96700, 119908, 135380, 149885, 169225, 209839, 299770, 338450, 419678, 599540, 676900, 749425, 839356, 1049195, 1498850, 2098390, 2997700, 4196780, 5245975, 10491950, 20983900]

約数ペア:

[(1, 20983900), (2, 10491950), (4, 5245975), (5, 4196780), (7, 2997700), (10, 2098390), (14, 1498850), (20, 1049195), (25, 839356), (28, 749425), (31, 676900), (35, 599540), (50, 419678), (62, 338450), (70, 299770), (100, 209839), (124, 169225), (140, 149885), (155, 135380), (175, 119908), (217, 96700), (310, 67690), (350, 59954), (434, 48350), (620, 33845), (700, 29977), (775, 27076), (868, 24175), (967, 21700), (1085, 19340), (1550, 13538), (1934, 10850), (2170, 9670), (3100, 6769), (3868, 5425), (4340, 4835)]