21980315

素因数分解:

$5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{4159}}^1$

素因数の和:4322

約数の個数: 16

約数和(自身を含む): 30351360

約数和(自身を除く): 8371045

約数列:

[1, 5, 7, 35, 151, 755, 1057, 4159, 5285, 20795, 29113, 145565, 628009, 3140045, 4396063, 21980315]

約数ペア:

[(1, 21980315), (5, 4396063), (7, 3140045), (35, 628009), (151, 145565), (755, 29113), (1057, 20795), (4159, 5285)]