64608640

素因数分解:

$2^7\times 5^1\times {\mathrm{157}}^1\times {\mathrm{643}}^1$

素因数の和:819

約数の個数: 64

約数和(自身を含む): 155680560

約数和(自身を除く): 91071920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 157, 160, 314, 320, 628, 640, 643, 785, 1256, 1286, 1570, 2512, 2572, 3140, 3215, 5024, 5144, 6280, 6430, 10048, 10288, 12560, 12860, 20096, 20576, 25120, 25720, 41152, 50240, 51440, 82304, 100480, 100951, 102880, 201902, 205760, 403804, 411520, 504755, 807608, 1009510, 1615216, 2019020, 3230432, 4038040, 6460864, 8076080, 12921728, 16152160, 32304320, 64608640]

約数ペア:

[(1, 64608640), (2, 32304320), (4, 16152160), (5, 12921728), (8, 8076080), (10, 6460864), (16, 4038040), (20, 3230432), (32, 2019020), (40, 1615216), (64, 1009510), (80, 807608), (128, 504755), (157, 411520), (160, 403804), (314, 205760), (320, 201902), (628, 102880), (640, 100951), (643, 100480), (785, 82304), (1256, 51440), (1286, 50240), (1570, 41152), (2512, 25720), (2572, 25120), (3140, 20576), (3215, 20096), (5024, 12860), (5144, 12560), (6280, 10288), (6430, 10048)]