400023040

素因数分解:

$2^9\times 5^1\times {\mathrm{156259}}^1$

素因数の和:156282

約数の個数: 40

約数和(自身を含む): 959123880

約数和(自身を除く): 559100840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 156259, 312518, 625036, 781295, 1250072, 1562590, 2500144, 3125180, 5000288, 6250360, 10000576, 12500720, 20001152, 25001440, 40002304, 50002880, 80004608, 100005760, 200011520, 400023040]

約数ペア:

[(1, 400023040), (2, 200011520), (4, 100005760), (5, 80004608), (8, 50002880), (10, 40002304), (16, 25001440), (20, 20001152), (32, 12500720), (40, 10000576), (64, 6250360), (80, 5000288), (128, 3125180), (160, 2500144), (256, 1562590), (320, 1250072), (512, 781295), (640, 625036), (1280, 312518), (2560, 156259)]