1991781

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:118

約数の個数: 36

約数和(自身を含む): 3319680

約数和(自身を除く): 1327899

約数列:

[1, 3, 9, 11, 31, 33, 59, 93, 99, 121, 177, 279, 341, 363, 531, 649, 1023, 1089, 1829, 1947, 3069, 3751, 5487, 5841, 7139, 11253, 16461, 20119, 21417, 33759, 60357, 64251, 181071, 221309, 663927, 1991781]

約数ペア:

[(1, 1991781), (3, 663927), (9, 221309), (11, 181071), (31, 64251), (33, 60357), (59, 33759), (93, 21417), (99, 20119), (121, 16461), (177, 11253), (279, 7139), (341, 5841), (363, 5487), (531, 3751), (649, 3069), (1023, 1947), (1089, 1829)]