19720385

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 26248320

約数和(自身を除く): 6527935

約数列:

[1, 5, 19, 41, 61, 83, 95, 205, 305, 415, 779, 1159, 1577, 2501, 3403, 3895, 5063, 5795, 7885, 12505, 17015, 25315, 47519, 64657, 96197, 207583, 237595, 323285, 480985, 1037915, 3944077, 19720385]

約数ペア:

[(1, 19720385), (5, 3944077), (19, 1037915), (41, 480985), (61, 323285), (83, 237595), (95, 207583), (205, 96197), (305, 64657), (415, 47519), (779, 25315), (1159, 17015), (1577, 12505), (2501, 7885), (3403, 5795), (3895, 5063)]