313645880

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{19751}}^1$

素因数の和:20159

約数の個数: 32

約数和(自身を含む): 707516640

約数和(自身を除く): 393870760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 15880, 19751, 39502, 79004, 98755, 158008, 197510, 395020, 790040, 7841147, 15682294, 31364588, 39205735, 62729176, 78411470, 156822940, 313645880]

約数ペア:

[(1, 313645880), (2, 156822940), (4, 78411470), (5, 62729176), (8, 39205735), (10, 31364588), (20, 15682294), (40, 7841147), (397, 790040), (794, 395020), (1588, 197510), (1985, 158008), (3176, 98755), (3970, 79004), (7940, 39502), (15880, 19751)]