20500895

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6870625

約数列:

[1, 5, 17, 43, 71, 79, 85, 215, 355, 395, 731, 1207, 1343, 3053, 3397, 3655, 5609, 6035, 6715, 15265, 16985, 28045, 51901, 57749, 95353, 241187, 259505, 288745, 476765, 1205935, 4100179, 20500895]

約数ペア:

[(1, 20500895), (5, 4100179), (17, 1205935), (43, 476765), (71, 288745), (79, 259505), (85, 241187), (215, 95353), (355, 57749), (395, 51901), (731, 28045), (1207, 16985), (1343, 15265), (3053, 6715), (3397, 6035), (3655, 5609)]