21815895

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1867}}^1$

素因数の和:1935

約数の個数: 32

約数和(自身を含む): 37658880

約数和(自身を除く): 15842985

約数列:

[1, 3, 5, 15, 19, 41, 57, 95, 123, 205, 285, 615, 779, 1867, 2337, 3895, 5601, 9335, 11685, 28005, 35473, 76547, 106419, 177365, 229641, 382735, 532095, 1148205, 1454393, 4363179, 7271965, 21815895]

約数ペア:

[(1, 21815895), (3, 7271965), (5, 4363179), (15, 1454393), (19, 1148205), (41, 532095), (57, 382735), (95, 229641), (123, 177365), (205, 106419), (285, 76547), (615, 35473), (779, 28005), (1867, 11685), (2337, 9335), (3895, 5601)]