21365175

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1289}}^1$

素因数の和:1332

約数の個数: 48

約数和(自身を含む): 40309920

約数和(自身を除く): 18944745

約数列:

[1, 3, 5, 13, 15, 17, 25, 39, 51, 65, 75, 85, 195, 221, 255, 325, 425, 663, 975, 1105, 1275, 1289, 3315, 3867, 5525, 6445, 16575, 16757, 19335, 21913, 32225, 50271, 65739, 83785, 96675, 109565, 251355, 284869, 328695, 418925, 547825, 854607, 1256775, 1424345, 1643475, 4273035, 7121725, 21365175]

約数ペア:

[(1, 21365175), (3, 7121725), (5, 4273035), (13, 1643475), (15, 1424345), (17, 1256775), (25, 854607), (39, 547825), (51, 418925), (65, 328695), (75, 284869), (85, 251355), (195, 109565), (221, 96675), (255, 83785), (325, 65739), (425, 50271), (663, 32225), (975, 21913), (1105, 19335), (1275, 16757), (1289, 16575), (3315, 6445), (3867, 5525)]