640304217

素因数分解:

$3^3\times 7^2\times {\mathrm{113}}^1\times {\mathrm{4283}}^1$

素因数の和:4419

約数の個数: 48

約数和(自身を含む): 1113497280

約数和(自身を除く): 473193063

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 113, 147, 189, 339, 441, 791, 1017, 1323, 2373, 3051, 4283, 5537, 7119, 12849, 16611, 21357, 29981, 38547, 49833, 89943, 115641, 149499, 209867, 269829, 483979, 629601, 809487, 1451937, 1888803, 3387853, 4355811, 5666409, 10163559, 13067433, 23714971, 30490677, 71144913, 91472031, 213434739, 640304217]

約数ペア:

[(1, 640304217), (3, 213434739), (7, 91472031), (9, 71144913), (21, 30490677), (27, 23714971), (49, 13067433), (63, 10163559), (113, 5666409), (147, 4355811), (189, 3387853), (339, 1888803), (441, 1451937), (791, 809487), (1017, 629601), (1323, 483979), (2373, 269829), (3051, 209867), (4283, 149499), (5537, 115641), (7119, 89943), (12849, 49833), (16611, 38547), (21357, 29981)]