21888135

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 17648505

約数列:

[1, 3, 5, 9, 15, 45, 47, 79, 131, 141, 235, 237, 393, 395, 423, 655, 705, 711, 1179, 1185, 1965, 2115, 3555, 3713, 5895, 6157, 10349, 11139, 18471, 18565, 30785, 31047, 33417, 51745, 55413, 55695, 92355, 93141, 155235, 167085, 277065, 465705, 486403, 1459209, 2432015, 4377627, 7296045, 21888135]

約数ペア:

[(1, 21888135), (3, 7296045), (5, 4377627), (9, 2432015), (15, 1459209), (45, 486403), (47, 465705), (79, 277065), (131, 167085), (141, 155235), (235, 93141), (237, 92355), (393, 55695), (395, 55413), (423, 51745), (655, 33417), (705, 31047), (711, 30785), (1179, 18565), (1185, 18471), (1965, 11139), (2115, 10349), (3555, 6157), (3713, 5895)]