28145680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{8581}}^1$

素因数の和:8635

約数の個数: 40

約数和(自身を含む): 67042584

約数和(自身を除く): 38896904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 8581, 17162, 34324, 42905, 68648, 85810, 137296, 171620, 343240, 351821, 686480, 703642, 1407284, 1759105, 2814568, 3518210, 5629136, 7036420, 14072840, 28145680]

約数ペア:

[(1, 28145680), (2, 14072840), (4, 7036420), (5, 5629136), (8, 3518210), (10, 2814568), (16, 1759105), (20, 1407284), (40, 703642), (41, 686480), (80, 351821), (82, 343240), (164, 171620), (205, 137296), (328, 85810), (410, 68648), (656, 42905), (820, 34324), (1640, 17162), (3280, 8581)]