21275163

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1237}}^1$

素因数の和:1273

約数の個数: 48

約数和(自身を含む): 39516960

約数和(自身を除く): 18241797

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1237, 1323, 1911, 2457, 3711, 5733, 8659, 11133, 16081, 17199, 25977, 33399, 48243, 60613, 77931, 112567, 144729, 181839, 233793, 337701, 434187, 545517, 787969, 1013103, 1636551, 2363907, 3039309, 7091721, 21275163]

約数ペア:

[(1, 21275163), (3, 7091721), (7, 3039309), (9, 2363907), (13, 1636551), (21, 1013103), (27, 787969), (39, 545517), (49, 434187), (63, 337701), (91, 233793), (117, 181839), (147, 144729), (189, 112567), (273, 77931), (351, 60613), (441, 48243), (637, 33399), (819, 25977), (1237, 17199), (1323, 16081), (1911, 11133), (2457, 8659), (3711, 5733)]