198809720

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{15679}}^1$

素因数の和:16007

約数の個数: 32

約数和(自身を含む): 448761600

約数和(自身を除く): 249951880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 2536, 3170, 6340, 12680, 15679, 31358, 62716, 78395, 125432, 156790, 313580, 627160, 4970243, 9940486, 19880972, 24851215, 39761944, 49702430, 99404860, 198809720]

約数ペア:

[(1, 198809720), (2, 99404860), (4, 49702430), (5, 39761944), (8, 24851215), (10, 19880972), (20, 9940486), (40, 4970243), (317, 627160), (634, 313580), (1268, 156790), (1585, 125432), (2536, 78395), (3170, 62716), (6340, 31358), (12680, 15679)]