20544075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 40216176

約数和(自身を除く): 19672101

約数列:

[1, 3, 5, 9, 15, 17, 25, 41, 45, 51, 75, 85, 123, 131, 153, 205, 225, 255, 369, 393, 425, 615, 655, 697, 765, 1025, 1179, 1275, 1845, 1965, 2091, 2227, 3075, 3275, 3485, 3825, 5371, 5895, 6273, 6681, 9225, 9825, 10455, 11135, 16113, 17425, 20043, 26855, 29475, 31365, 33405, 48339, 52275, 55675, 80565, 91307, 100215, 134275, 156825, 167025, 241695, 273921, 402825, 456535, 501075, 821763, 1208475, 1369605, 2282675, 4108815, 6848025, 20544075]

約数ペア:

[(1, 20544075), (3, 6848025), (5, 4108815), (9, 2282675), (15, 1369605), (17, 1208475), (25, 821763), (41, 501075), (45, 456535), (51, 402825), (75, 273921), (85, 241695), (123, 167025), (131, 156825), (153, 134275), (205, 100215), (225, 91307), (255, 80565), (369, 55675), (393, 52275), (425, 48339), (615, 33405), (655, 31365), (697, 29475), (765, 26855), (1025, 20043), (1179, 17425), (1275, 16113), (1845, 11135), (1965, 10455), (2091, 9825), (2227, 9225), (3075, 6681), (3275, 6273), (3485, 5895), (3825, 5371)]