260778400

素因数分解:

$2^5\times 5^2\times {\mathrm{409}}^1\times {\mathrm{797}}^1$

素因数の和:1226

約数の個数: 72

約数和(自身を含む): 638982540

約数和(自身を除く): 378204140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 409, 797, 800, 818, 1594, 1636, 2045, 3188, 3272, 3985, 4090, 6376, 6544, 7970, 8180, 10225, 12752, 13088, 15940, 16360, 19925, 20450, 25504, 31880, 32720, 39850, 40900, 63760, 65440, 79700, 81800, 127520, 159400, 163600, 318800, 325973, 327200, 637600, 651946, 1303892, 1629865, 2607784, 3259730, 5215568, 6519460, 8149325, 10431136, 13038920, 16298650, 26077840, 32597300, 52155680, 65194600, 130389200, 260778400]

約数ペア:

[(1, 260778400), (2, 130389200), (4, 65194600), (5, 52155680), (8, 32597300), (10, 26077840), (16, 16298650), (20, 13038920), (25, 10431136), (32, 8149325), (40, 6519460), (50, 5215568), (80, 3259730), (100, 2607784), (160, 1629865), (200, 1303892), (400, 651946), (409, 637600), (797, 327200), (800, 325973), (818, 318800), (1594, 163600), (1636, 159400), (2045, 127520), (3188, 81800), (3272, 79700), (3985, 65440), (4090, 63760), (6376, 40900), (6544, 39850), (7970, 32720), (8180, 31880), (10225, 25504), (12752, 20450), (13088, 19925), (15940, 16360)]