21084675

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{719}}^1$

素因数の和:772

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17484285

約数列:

[1, 3, 5, 15, 17, 23, 25, 51, 69, 75, 85, 115, 255, 345, 391, 425, 575, 719, 1173, 1275, 1725, 1955, 2157, 3595, 5865, 9775, 10785, 12223, 16537, 17975, 29325, 36669, 49611, 53925, 61115, 82685, 183345, 248055, 281129, 305575, 413425, 843387, 916725, 1240275, 1405645, 4216935, 7028225, 21084675]

約数ペア:

[(1, 21084675), (3, 7028225), (5, 4216935), (15, 1405645), (17, 1240275), (23, 916725), (25, 843387), (51, 413425), (69, 305575), (75, 281129), (85, 248055), (115, 183345), (255, 82685), (345, 61115), (391, 53925), (425, 49611), (575, 36669), (719, 29325), (1173, 17975), (1275, 16537), (1725, 12223), (1955, 10785), (2157, 9775), (3595, 5865)]