81394480

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53549}}^1$

素因数の和:53581

約数の個数: 40

約数和(自身を含む): 199206000

約数和(自身を除く): 117811520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 53549, 107098, 214196, 267745, 428392, 535490, 856784, 1017431, 1070980, 2034862, 2141960, 4069724, 4283920, 5087155, 8139448, 10174310, 16278896, 20348620, 40697240, 81394480]

約数ペア:

[(1, 81394480), (2, 40697240), (4, 20348620), (5, 16278896), (8, 10174310), (10, 8139448), (16, 5087155), (19, 4283920), (20, 4069724), (38, 2141960), (40, 2034862), (76, 1070980), (80, 1017431), (95, 856784), (152, 535490), (190, 428392), (304, 267745), (380, 214196), (760, 107098), (1520, 53549)]