81660460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{809}}^1$

素因数の和:935

約数の個数: 72

約数和(自身を含む): 201670560

約数和(自身を除く): 120010100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 103, 140, 196, 206, 245, 412, 490, 515, 721, 809, 980, 1030, 1442, 1618, 2060, 2884, 3236, 3605, 4045, 5047, 5663, 7210, 8090, 10094, 11326, 14420, 16180, 20188, 22652, 25235, 28315, 39641, 50470, 56630, 79282, 83327, 100940, 113260, 158564, 166654, 198205, 333308, 396410, 416635, 583289, 792820, 833270, 1166578, 1666540, 2333156, 2916445, 4083023, 5832890, 8166046, 11665780, 16332092, 20415115, 40830230, 81660460]

約数ペア:

[(1, 81660460), (2, 40830230), (4, 20415115), (5, 16332092), (7, 11665780), (10, 8166046), (14, 5832890), (20, 4083023), (28, 2916445), (35, 2333156), (49, 1666540), (70, 1166578), (98, 833270), (103, 792820), (140, 583289), (196, 416635), (206, 396410), (245, 333308), (412, 198205), (490, 166654), (515, 158564), (721, 113260), (809, 100940), (980, 83327), (1030, 79282), (1442, 56630), (1618, 50470), (2060, 39641), (2884, 28315), (3236, 25235), (3605, 22652), (4045, 20188), (5047, 16180), (5663, 14420), (7210, 11326), (8090, 10094)]