21202005

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6763}}^1$

素因数の和:6801

約数の個数: 32

約数和(自身を含む): 38960640

約数和(自身を除く): 17758635

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6763, 20289, 33815, 74393, 101445, 128497, 223179, 371965, 385491, 642485, 1115895, 1413467, 1927455, 4240401, 7067335, 21202005]

約数ペア:

[(1, 21202005), (3, 7067335), (5, 4240401), (11, 1927455), (15, 1413467), (19, 1115895), (33, 642485), (55, 385491), (57, 371965), (95, 223179), (165, 128497), (209, 101445), (285, 74393), (627, 33815), (1045, 20289), (3135, 6763)]