64400320

素因数分解:

$2^6\times 5^1\times {\mathrm{201251}}^1$

素因数の和:201268

約数の個数: 28

約数和(自身を含む): 153354024

約数和(自身を除く): 88953704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 201251, 402502, 805004, 1006255, 1610008, 2012510, 3220016, 4025020, 6440032, 8050040, 12880064, 16100080, 32200160, 64400320]

約数ペア:

[(1, 64400320), (2, 32200160), (4, 16100080), (5, 12880064), (8, 8050040), (10, 6440032), (16, 4025020), (20, 3220016), (32, 2012510), (40, 1610008), (64, 1006255), (80, 805004), (160, 402502), (320, 201251)]