21311390

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{881}}^1$

素因数の和:988

約数の個数: 32

約数和(自身を含む): 40007520

約数和(自身を除く): 18696130

約数列:

[1, 2, 5, 10, 41, 59, 82, 118, 205, 295, 410, 590, 881, 1762, 2419, 4405, 4838, 8810, 12095, 24190, 36121, 51979, 72242, 103958, 180605, 259895, 361210, 519790, 2131139, 4262278, 10655695, 21311390]

約数ペア:

[(1, 21311390), (2, 10655695), (5, 4262278), (10, 2131139), (41, 519790), (59, 361210), (82, 259895), (118, 180605), (205, 103958), (295, 72242), (410, 51979), (590, 36121), (881, 24190), (1762, 12095), (2419, 8810), (4405, 4838)]