78901520

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5449}}^1$

素因数の和:5643

約数の個数: 40

約数和(自身を含む): 184493400

約数和(自身を除く): 105591880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1810, 2896, 3620, 5449, 7240, 10898, 14480, 21796, 27245, 43592, 54490, 87184, 108980, 217960, 435920, 986269, 1972538, 3945076, 4931345, 7890152, 9862690, 15780304, 19725380, 39450760, 78901520]

約数ペア:

[(1, 78901520), (2, 39450760), (4, 19725380), (5, 15780304), (8, 9862690), (10, 7890152), (16, 4931345), (20, 3945076), (40, 1972538), (80, 986269), (181, 435920), (362, 217960), (724, 108980), (905, 87184), (1448, 54490), (1810, 43592), (2896, 27245), (3620, 21796), (5449, 14480), (7240, 10898)]