51456800

素因数分解:

$2^5\times 5^2\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:642

約数の個数: 72

約数和(自身を含む): 126835632

約数和(自身を除く): 75378832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 131, 160, 200, 262, 400, 491, 524, 655, 800, 982, 1048, 1310, 1964, 2096, 2455, 2620, 3275, 3928, 4192, 4910, 5240, 6550, 7856, 9820, 10480, 12275, 13100, 15712, 19640, 20960, 24550, 26200, 39280, 49100, 52400, 64321, 78560, 98200, 104800, 128642, 196400, 257284, 321605, 392800, 514568, 643210, 1029136, 1286420, 1608025, 2058272, 2572840, 3216050, 5145680, 6432100, 10291360, 12864200, 25728400, 51456800]

約数ペア:

[(1, 51456800), (2, 25728400), (4, 12864200), (5, 10291360), (8, 6432100), (10, 5145680), (16, 3216050), (20, 2572840), (25, 2058272), (32, 1608025), (40, 1286420), (50, 1029136), (80, 643210), (100, 514568), (131, 392800), (160, 321605), (200, 257284), (262, 196400), (400, 128642), (491, 104800), (524, 98200), (655, 78560), (800, 64321), (982, 52400), (1048, 49100), (1310, 39280), (1964, 26200), (2096, 24550), (2455, 20960), (2620, 19640), (3275, 15712), (3928, 13100), (4192, 12275), (4910, 10480), (5240, 9820), (6550, 7856)]