18721965

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{193}}^1\times {\mathrm{223}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 31288320

約数和(自身を除く): 12566355

約数列:

[1, 3, 5, 15, 29, 87, 145, 193, 223, 435, 579, 669, 965, 1115, 2895, 3345, 5597, 6467, 16791, 19401, 27985, 32335, 43039, 83955, 97005, 129117, 215195, 645585, 1248131, 3744393, 6240655, 18721965]

約数ペア:

[(1, 18721965), (3, 6240655), (5, 3744393), (15, 1248131), (29, 645585), (87, 215195), (145, 129117), (193, 97005), (223, 83955), (435, 43039), (579, 32335), (669, 27985), (965, 19401), (1115, 16791), (2895, 6467), (3345, 5597)]