21501075

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{113}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 15817965

約数列:

[1, 3, 5, 15, 25, 43, 59, 75, 113, 129, 177, 215, 295, 339, 565, 645, 885, 1075, 1475, 1695, 2537, 2825, 3225, 4425, 4859, 6667, 7611, 8475, 12685, 14577, 20001, 24295, 33335, 38055, 63425, 72885, 100005, 121475, 166675, 190275, 286681, 364425, 500025, 860043, 1433405, 4300215, 7167025, 21501075]

約数ペア:

[(1, 21501075), (3, 7167025), (5, 4300215), (15, 1433405), (25, 860043), (43, 500025), (59, 364425), (75, 286681), (113, 190275), (129, 166675), (177, 121475), (215, 100005), (295, 72885), (339, 63425), (565, 38055), (645, 33335), (885, 24295), (1075, 20001), (1475, 14577), (1695, 12685), (2537, 8475), (2825, 7611), (3225, 6667), (4425, 4859)]