21236145

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11897}}^1$

素因数の和:11929

約数の個数: 32

約数和(自身を含む): 41119488

約数和(自身を除く): 19883343

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11897, 35691, 59485, 83279, 178455, 202249, 249837, 416395, 606747, 1011245, 1249185, 1415743, 3033735, 4247229, 7078715, 21236145]

約数ペア:

[(1, 21236145), (3, 7078715), (5, 4247229), (7, 3033735), (15, 1415743), (17, 1249185), (21, 1011245), (35, 606747), (51, 416395), (85, 249837), (105, 202249), (119, 178455), (255, 83279), (357, 59485), (595, 35691), (1785, 11897)]