21863751

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{673}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 38725344

約数和(自身を除く): 16861593

約数列:

[1, 3, 7, 13, 17, 21, 39, 49, 51, 91, 119, 147, 221, 273, 357, 637, 663, 673, 833, 1547, 1911, 2019, 2499, 4641, 4711, 8749, 10829, 11441, 14133, 26247, 32487, 32977, 34323, 61243, 80087, 98931, 148733, 183729, 240261, 428701, 446199, 560609, 1041131, 1286103, 1681827, 3123393, 7287917, 21863751]

約数ペア:

[(1, 21863751), (3, 7287917), (7, 3123393), (13, 1681827), (17, 1286103), (21, 1041131), (39, 560609), (49, 446199), (51, 428701), (91, 240261), (119, 183729), (147, 148733), (221, 98931), (273, 80087), (357, 61243), (637, 34323), (663, 32977), (673, 32487), (833, 26247), (1547, 14133), (1911, 11441), (2019, 10829), (2499, 8749), (4641, 4711)]