17721225

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 34732152

約数和(自身を除く): 17010927

約数列:

[1, 3, 5, 9, 15, 17, 25, 41, 45, 51, 75, 85, 113, 123, 153, 205, 225, 255, 339, 369, 425, 565, 615, 697, 765, 1017, 1025, 1275, 1695, 1845, 1921, 2091, 2825, 3075, 3485, 3825, 4633, 5085, 5763, 6273, 8475, 9225, 9605, 10455, 13899, 17289, 17425, 23165, 25425, 28815, 31365, 41697, 48025, 52275, 69495, 78761, 86445, 115825, 144075, 156825, 208485, 236283, 347475, 393805, 432225, 708849, 1042425, 1181415, 1969025, 3544245, 5907075, 17721225]

約数ペア:

[(1, 17721225), (3, 5907075), (5, 3544245), (9, 1969025), (15, 1181415), (17, 1042425), (25, 708849), (41, 432225), (45, 393805), (51, 347475), (75, 236283), (85, 208485), (113, 156825), (123, 144075), (153, 115825), (205, 86445), (225, 78761), (255, 69495), (339, 52275), (369, 48025), (425, 41697), (565, 31365), (615, 28815), (697, 25425), (765, 23165), (1017, 17425), (1025, 17289), (1275, 13899), (1695, 10455), (1845, 9605), (1921, 9225), (2091, 8475), (2825, 6273), (3075, 5763), (3485, 5085), (3825, 4633)]