21246645

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 40022208

約数和(自身を除く): 18775563

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 137, 147, 211, 245, 411, 633, 685, 735, 959, 1055, 1477, 2055, 2877, 3165, 4431, 4795, 6713, 7385, 10339, 14385, 20139, 22155, 28907, 31017, 33565, 51695, 86721, 100695, 144535, 155085, 202349, 433605, 607047, 1011745, 1416443, 3035235, 4249329, 7082215, 21246645]

約数ペア:

[(1, 21246645), (3, 7082215), (5, 4249329), (7, 3035235), (15, 1416443), (21, 1011745), (35, 607047), (49, 433605), (105, 202349), (137, 155085), (147, 144535), (211, 100695), (245, 86721), (411, 51695), (633, 33565), (685, 31017), (735, 28907), (959, 22155), (1055, 20139), (1477, 14385), (2055, 10339), (2877, 7385), (3165, 6713), (4431, 4795)]