80821960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{65179}}^1$

素因数の和:65221

約数の個数: 32

約数和(自身を含む): 187718400

約数和(自身を除く): 106896440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 65179, 130358, 260716, 325895, 521432, 651790, 1303580, 2020549, 2607160, 4041098, 8082196, 10102745, 16164392, 20205490, 40410980, 80821960]

約数ペア:

[(1, 80821960), (2, 40410980), (4, 20205490), (5, 16164392), (8, 10102745), (10, 8082196), (20, 4041098), (31, 2607160), (40, 2020549), (62, 1303580), (124, 651790), (155, 521432), (248, 325895), (310, 260716), (620, 130358), (1240, 65179)]