21397584

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{647}}^1$

素因数の和:724

約数の個数: 80

約数和(自身を含む): 60746112

約数和(自身を除く): 39348528

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 53, 78, 104, 106, 156, 159, 208, 212, 312, 318, 424, 624, 636, 647, 689, 848, 1272, 1294, 1378, 1941, 2067, 2544, 2588, 2756, 3882, 4134, 5176, 5512, 7764, 8268, 8411, 10352, 11024, 15528, 16536, 16822, 25233, 31056, 33072, 33644, 34291, 50466, 67288, 68582, 100932, 102873, 134576, 137164, 201864, 205746, 274328, 403728, 411492, 445783, 548656, 822984, 891566, 1337349, 1645968, 1783132, 2674698, 3566264, 5349396, 7132528, 10698792, 21397584]

約数ペア:

[(1, 21397584), (2, 10698792), (3, 7132528), (4, 5349396), (6, 3566264), (8, 2674698), (12, 1783132), (13, 1645968), (16, 1337349), (24, 891566), (26, 822984), (39, 548656), (48, 445783), (52, 411492), (53, 403728), (78, 274328), (104, 205746), (106, 201864), (156, 137164), (159, 134576), (208, 102873), (212, 100932), (312, 68582), (318, 67288), (424, 50466), (624, 34291), (636, 33644), (647, 33072), (689, 31056), (848, 25233), (1272, 16822), (1294, 16536), (1378, 15528), (1941, 11024), (2067, 10352), (2544, 8411), (2588, 8268), (2756, 7764), (3882, 5512), (4134, 5176)]