21386025

素因数分解:

$3^4\times 5^2\times {\mathrm{59}}^1\times {\mathrm{179}}^1$

素因数の和:260

約数の個数: 60

約数和(自身を含む): 40510800

約数和(自身を除く): 19124775

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 59, 75, 81, 135, 177, 179, 225, 295, 405, 531, 537, 675, 885, 895, 1475, 1593, 1611, 2025, 2655, 2685, 4425, 4475, 4779, 4833, 7965, 8055, 10561, 13275, 13425, 14499, 23895, 24165, 31683, 39825, 40275, 52805, 72495, 95049, 119475, 120825, 158415, 264025, 285147, 362475, 475245, 792075, 855441, 1425735, 2376225, 4277205, 7128675, 21386025]

約数ペア:

[(1, 21386025), (3, 7128675), (5, 4277205), (9, 2376225), (15, 1425735), (25, 855441), (27, 792075), (45, 475245), (59, 362475), (75, 285147), (81, 264025), (135, 158415), (177, 120825), (179, 119475), (225, 95049), (295, 72495), (405, 52805), (531, 40275), (537, 39825), (675, 31683), (885, 24165), (895, 23895), (1475, 14499), (1593, 13425), (1611, 13275), (2025, 10561), (2655, 8055), (2685, 7965), (4425, 4833), (4475, 4779)]