21978585

素因数分解:

$3^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{971}}^1$

素因数の和:1485

約数の個数: 24

約数和(自身を含む): 38211264

約数和(自身を除く): 16232679

約数列:

[1, 3, 5, 9, 15, 45, 503, 971, 1509, 2515, 2913, 4527, 4855, 7545, 8739, 14565, 22635, 43695, 488413, 1465239, 2442065, 4395717, 7326195, 21978585]

約数ペア:

[(1, 21978585), (3, 7326195), (5, 4395717), (9, 2442065), (15, 1465239), (45, 488413), (503, 43695), (971, 22635), (1509, 14565), (2515, 8739), (2913, 7545), (4527, 4855)]