81660800

素因数分解:

$2^7\times 5^2\times {\mathrm{13}}^2\times {\mathrm{151}}^1$

素因数の和:201

約数の個数: 144

約数和(自身を含む): 219885480

約数和(自身を除く): 138224680

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 128, 130, 151, 160, 169, 200, 208, 260, 302, 320, 325, 338, 400, 416, 520, 604, 640, 650, 676, 755, 800, 832, 845, 1040, 1208, 1300, 1352, 1510, 1600, 1664, 1690, 1963, 2080, 2416, 2600, 2704, 3020, 3200, 3380, 3775, 3926, 4160, 4225, 4832, 5200, 5408, 6040, 6760, 7550, 7852, 8320, 8450, 9664, 9815, 10400, 10816, 12080, 13520, 15100, 15704, 16900, 19328, 19630, 20800, 21632, 24160, 25519, 27040, 30200, 31408, 33800, 39260, 41600, 48320, 49075, 51038, 54080, 60400, 62816, 67600, 78520, 96640, 98150, 102076, 108160, 120800, 125632, 127595, 135200, 157040, 196300, 204152, 241600, 251264, 255190, 270400, 314080, 392600, 408304, 483200, 510380, 540800, 628160, 637975, 785200, 816608, 1020760, 1256320, 1275950, 1570400, 1633216, 2041520, 2551900, 3140800, 3266432, 4083040, 5103800, 6281600, 8166080, 10207600, 16332160, 20415200, 40830400, 81660800]

約数ペア:

[(1, 81660800), (2, 40830400), (4, 20415200), (5, 16332160), (8, 10207600), (10, 8166080), (13, 6281600), (16, 5103800), (20, 4083040), (25, 3266432), (26, 3140800), (32, 2551900), (40, 2041520), (50, 1633216), (52, 1570400), (64, 1275950), (65, 1256320), (80, 1020760), (100, 816608), (104, 785200), (128, 637975), (130, 628160), (151, 540800), (160, 510380), (169, 483200), (200, 408304), (208, 392600), (260, 314080), (302, 270400), (320, 255190), (325, 251264), (338, 241600), (400, 204152), (416, 196300), (520, 157040), (604, 135200), (640, 127595), (650, 125632), (676, 120800), (755, 108160), (800, 102076), (832, 98150), (845, 96640), (1040, 78520), (1208, 67600), (1300, 62816), (1352, 60400), (1510, 54080), (1600, 51038), (1664, 49075), (1690, 48320), (1963, 41600), (2080, 39260), (2416, 33800), (2600, 31408), (2704, 30200), (3020, 27040), (3200, 25519), (3380, 24160), (3775, 21632), (3926, 20800), (4160, 19630), (4225, 19328), (4832, 16900), (5200, 15704), (5408, 15100), (6040, 13520), (6760, 12080), (7550, 10816), (7852, 10400), (8320, 9815), (8450, 9664)]