21517251

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{373}}^1$

素因数の和:491

約数の個数: 32

約数和(自身を含む): 34180608

約数和(自身を除く): 12663357

約数列:

[1, 3, 7, 21, 41, 67, 123, 201, 287, 373, 469, 861, 1119, 1407, 2611, 2747, 7833, 8241, 15293, 19229, 24991, 45879, 57687, 74973, 107051, 174937, 321153, 524811, 1024631, 3073893, 7172417, 21517251]

約数ペア:

[(1, 21517251), (3, 7172417), (7, 3073893), (21, 1024631), (41, 524811), (67, 321153), (123, 174937), (201, 107051), (287, 74973), (373, 57687), (469, 45879), (861, 24991), (1119, 19229), (1407, 15293), (2611, 8241), (2747, 7833)]