399670520

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1\times {\mathrm{857}}^1$

素因数の和:1088

約数の個数: 64

約数和(自身を含む): 917373600

約数和(自身を除く): 517703080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 131, 178, 262, 356, 445, 524, 655, 712, 857, 890, 1048, 1310, 1714, 1780, 2620, 3428, 3560, 4285, 5240, 6856, 8570, 11659, 17140, 23318, 34280, 46636, 58295, 76273, 93272, 112267, 116590, 152546, 224534, 233180, 305092, 381365, 449068, 466360, 561335, 610184, 762730, 898136, 1122670, 1525460, 2245340, 3050920, 4490680, 9991763, 19983526, 39967052, 49958815, 79934104, 99917630, 199835260, 399670520]

約数ペア:

[(1, 399670520), (2, 199835260), (4, 99917630), (5, 79934104), (8, 49958815), (10, 39967052), (20, 19983526), (40, 9991763), (89, 4490680), (131, 3050920), (178, 2245340), (262, 1525460), (356, 1122670), (445, 898136), (524, 762730), (655, 610184), (712, 561335), (857, 466360), (890, 449068), (1048, 381365), (1310, 305092), (1714, 233180), (1780, 224534), (2620, 152546), (3428, 116590), (3560, 112267), (4285, 93272), (5240, 76273), (6856, 58295), (8570, 46636), (11659, 34280), (17140, 23318)]