21298875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 40569984

約数和(自身を除く): 19271109

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 125, 195, 221, 255, 257, 325, 375, 425, 663, 771, 975, 1105, 1275, 1285, 1625, 2125, 3315, 3341, 3855, 4369, 4875, 5525, 6375, 6425, 10023, 13107, 16575, 16705, 19275, 21845, 27625, 32125, 50115, 56797, 65535, 82875, 83525, 96375, 109225, 170391, 250575, 283985, 327675, 417625, 546125, 851955, 1252875, 1419925, 1638375, 4259775, 7099625, 21298875]

約数ペア:

[(1, 21298875), (3, 7099625), (5, 4259775), (13, 1638375), (15, 1419925), (17, 1252875), (25, 851955), (39, 546125), (51, 417625), (65, 327675), (75, 283985), (85, 250575), (125, 170391), (195, 109225), (221, 96375), (255, 83525), (257, 82875), (325, 65535), (375, 56797), (425, 50115), (663, 32125), (771, 27625), (975, 21845), (1105, 19275), (1275, 16705), (1285, 16575), (1625, 13107), (2125, 10023), (3315, 6425), (3341, 6375), (3855, 5525), (4369, 4875)]