28187355

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 55296000

約数和(自身を除く): 27108645

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 71, 95, 105, 133, 199, 213, 285, 355, 399, 497, 597, 665, 995, 1065, 1349, 1393, 1491, 1995, 2485, 2985, 3781, 4047, 4179, 6745, 6965, 7455, 9443, 11343, 14129, 18905, 20235, 20895, 26467, 28329, 42387, 47215, 56715, 70645, 79401, 98903, 132335, 141645, 211935, 268451, 296709, 397005, 494515, 805353, 1342255, 1483545, 1879157, 4026765, 5637471, 9395785, 28187355]

約数ペア:

[(1, 28187355), (3, 9395785), (5, 5637471), (7, 4026765), (15, 1879157), (19, 1483545), (21, 1342255), (35, 805353), (57, 494515), (71, 397005), (95, 296709), (105, 268451), (133, 211935), (199, 141645), (213, 132335), (285, 98903), (355, 79401), (399, 70645), (497, 56715), (597, 47215), (665, 42387), (995, 28329), (1065, 26467), (1349, 20895), (1393, 20235), (1491, 18905), (1995, 14129), (2485, 11343), (2985, 9443), (3781, 7455), (4047, 6965), (4179, 6745)]