21657645

素因数分解:

$3^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1171}}^1$

素因数の和:1322

約数の個数: 32

約数和(自身を含む): 38816640

約数和(自身を除く): 17158995

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 137, 411, 685, 1171, 1233, 2055, 3513, 3699, 5855, 6165, 10539, 17565, 18495, 31617, 52695, 158085, 160427, 481281, 802135, 1443843, 2406405, 4331529, 7219215, 21657645]

約数ペア:

[(1, 21657645), (3, 7219215), (5, 4331529), (9, 2406405), (15, 1443843), (27, 802135), (45, 481281), (135, 160427), (137, 158085), (411, 52695), (685, 31617), (1171, 18495), (1233, 17565), (2055, 10539), (3513, 6165), (3699, 5855)]