20199620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{919}}^1$

素因数の和:1092

約数の個数: 48

約数和(自身を含む): 48840960

約数和(自身を除く): 28641340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 919, 1099, 1570, 1838, 2198, 3140, 3676, 4396, 4595, 5495, 6433, 9190, 10990, 12866, 18380, 21980, 25732, 32165, 64330, 128660, 144283, 288566, 577132, 721415, 1009981, 1442830, 2019962, 2885660, 4039924, 5049905, 10099810, 20199620]

約数ペア:

[(1, 20199620), (2, 10099810), (4, 5049905), (5, 4039924), (7, 2885660), (10, 2019962), (14, 1442830), (20, 1009981), (28, 721415), (35, 577132), (70, 288566), (140, 144283), (157, 128660), (314, 64330), (628, 32165), (785, 25732), (919, 21980), (1099, 18380), (1570, 12866), (1838, 10990), (2198, 9190), (3140, 6433), (3676, 5495), (4396, 4595)]