991220690

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{53783}}^1$

素因数の和:53906

約数の個数: 32

約数和(自身を含む): 1897499520

約数和(自身を除く): 906278830

約数列:

[1, 2, 5, 10, 19, 38, 95, 97, 190, 194, 485, 970, 1843, 3686, 9215, 18430, 53783, 107566, 268915, 537830, 1021877, 2043754, 5109385, 5216951, 10218770, 10433902, 26084755, 52169510, 99122069, 198244138, 495610345, 991220690]

約数ペア:

[(1, 991220690), (2, 495610345), (5, 198244138), (10, 99122069), (19, 52169510), (38, 26084755), (95, 10433902), (97, 10218770), (190, 5216951), (194, 5109385), (485, 2043754), (970, 1021877), (1843, 537830), (3686, 268915), (9215, 107566), (18430, 53783)]