21310425

素因数分解:

$3^3\times 5^2\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:391

約数の個数: 48

約数和(自身を含む): 39610560

約数和(自身を除く): 18300135

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 131, 135, 225, 241, 393, 655, 675, 723, 1179, 1205, 1965, 2169, 3275, 3537, 3615, 5895, 6025, 6507, 9825, 10845, 17685, 18075, 29475, 31571, 32535, 54225, 88425, 94713, 157855, 162675, 284139, 473565, 789275, 852417, 1420695, 2367825, 4262085, 7103475, 21310425]

約数ペア:

[(1, 21310425), (3, 7103475), (5, 4262085), (9, 2367825), (15, 1420695), (25, 852417), (27, 789275), (45, 473565), (75, 284139), (131, 162675), (135, 157855), (225, 94713), (241, 88425), (393, 54225), (655, 32535), (675, 31571), (723, 29475), (1179, 18075), (1205, 17685), (1965, 10845), (2169, 9825), (3275, 6507), (3537, 6025), (3615, 5895)]