81517880

素因数分解:

$2^3\times 5^1\times {\mathrm{541}}^1\times {\mathrm{3767}}^1$

素因数の和:4319

約数の個数: 32

約数和(自身を含む): 183803040

約数和(自身を除く): 102285160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541, 1082, 2164, 2705, 3767, 4328, 5410, 7534, 10820, 15068, 18835, 21640, 30136, 37670, 75340, 150680, 2037947, 4075894, 8151788, 10189735, 16303576, 20379470, 40758940, 81517880]

約数ペア:

[(1, 81517880), (2, 40758940), (4, 20379470), (5, 16303576), (8, 10189735), (10, 8151788), (20, 4075894), (40, 2037947), (541, 150680), (1082, 75340), (2164, 37670), (2705, 30136), (3767, 21640), (4328, 18835), (5410, 15068), (7534, 10820)]