399718720

素因数分解:

$2^6\times 5^1\times {\mathrm{1249121}}^1$

素因数の和:1249138

約数の個数: 28

約数和(自身を含む): 951830964

約数和(自身を除く): 552112244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1249121, 2498242, 4996484, 6245605, 9992968, 12491210, 19985936, 24982420, 39971872, 49964840, 79943744, 99929680, 199859360, 399718720]

約数ペア:

[(1, 399718720), (2, 199859360), (4, 99929680), (5, 79943744), (8, 49964840), (10, 39971872), (16, 24982420), (20, 19985936), (32, 12491210), (40, 9992968), (64, 6245605), (80, 4996484), (160, 2498242), (320, 1249121)]