319757440

素因数分解:

$2^7\times 5^1\times {\mathrm{499621}}^1$

素因数の和:499640

約数の個数: 32

約数和(自身を含む): 764421660

約数和(自身を除く): 444664220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 499621, 999242, 1998484, 2498105, 3996968, 4996210, 7993936, 9992420, 15987872, 19984840, 31975744, 39969680, 63951488, 79939360, 159878720, 319757440]

約数ペア:

[(1, 319757440), (2, 159878720), (4, 79939360), (5, 63951488), (8, 39969680), (10, 31975744), (16, 19984840), (20, 15987872), (32, 9992420), (40, 7993936), (64, 4996210), (80, 3996968), (128, 2498105), (160, 1998484), (320, 999242), (640, 499621)]