21120370

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{197}}^1$

素因数の和:426

約数の個数: 32

約数和(自身を含む): 39004416

約数和(自身を除く): 17884046

約数列:

[1, 2, 5, 10, 71, 142, 151, 197, 302, 355, 394, 710, 755, 985, 1510, 1970, 10721, 13987, 21442, 27974, 29747, 53605, 59494, 69935, 107210, 139870, 148735, 297470, 2112037, 4224074, 10560185, 21120370]

約数ペア:

[(1, 21120370), (2, 10560185), (5, 4224074), (10, 2112037), (71, 297470), (142, 148735), (151, 139870), (197, 107210), (302, 69935), (355, 59494), (394, 53605), (710, 29747), (755, 27974), (985, 21442), (1510, 13987), (1970, 10721)]