81591200

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{1291}}^1$

素因数の和:1390

約数の個数: 72

約数和(自身を含む): 201862080

約数和(自身を除く): 120270880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 316, 395, 400, 632, 790, 800, 1264, 1291, 1580, 1975, 2528, 2582, 3160, 3950, 5164, 6320, 6455, 7900, 10328, 12640, 12910, 15800, 20656, 25820, 31600, 32275, 41312, 51640, 63200, 64550, 101989, 103280, 129100, 203978, 206560, 258200, 407956, 509945, 516400, 815912, 1019890, 1032800, 1631824, 2039780, 2549725, 3263648, 4079560, 5099450, 8159120, 10198900, 16318240, 20397800, 40795600, 81591200]

約数ペア:

[(1, 81591200), (2, 40795600), (4, 20397800), (5, 16318240), (8, 10198900), (10, 8159120), (16, 5099450), (20, 4079560), (25, 3263648), (32, 2549725), (40, 2039780), (50, 1631824), (79, 1032800), (80, 1019890), (100, 815912), (158, 516400), (160, 509945), (200, 407956), (316, 258200), (395, 206560), (400, 203978), (632, 129100), (790, 103280), (800, 101989), (1264, 64550), (1291, 63200), (1580, 51640), (1975, 41312), (2528, 32275), (2582, 31600), (3160, 25820), (3950, 20656), (5164, 15800), (6320, 12910), (6455, 12640), (7900, 10328)]