21593781

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{251}}^1$

素因数の和:358

約数の個数: 36

約数和(自身を含む): 34856640

約数和(自身を除く): 13262859

約数列:

[1, 3, 9, 11, 33, 79, 99, 121, 237, 251, 363, 711, 753, 869, 1089, 2259, 2607, 2761, 7821, 8283, 9559, 19829, 24849, 28677, 30371, 59487, 86031, 91113, 178461, 218119, 273339, 654357, 1963071, 2399309, 7197927, 21593781]

約数ペア:

[(1, 21593781), (3, 7197927), (9, 2399309), (11, 1963071), (33, 654357), (79, 273339), (99, 218119), (121, 178461), (237, 91113), (251, 86031), (363, 59487), (711, 30371), (753, 28677), (869, 24849), (1089, 19829), (2259, 9559), (2607, 8283), (2761, 7821)]