19986944

素因数分解:

$2^9\times {\mathrm{103}}^1\times {\mathrm{379}}^1$

素因数の和:500

約数の個数: 40

約数和(自身を含む): 40428960

約数和(自身を除く): 20442016

約数列:

[1, 2, 4, 8, 16, 32, 64, 103, 128, 206, 256, 379, 412, 512, 758, 824, 1516, 1648, 3032, 3296, 6064, 6592, 12128, 13184, 24256, 26368, 39037, 48512, 52736, 78074, 97024, 156148, 194048, 312296, 624592, 1249184, 2498368, 4996736, 9993472, 19986944]

約数ペア:

[(1, 19986944), (2, 9993472), (4, 4996736), (8, 2498368), (16, 1249184), (32, 624592), (64, 312296), (103, 194048), (128, 156148), (206, 97024), (256, 78074), (379, 52736), (412, 48512), (512, 39037), (758, 26368), (824, 24256), (1516, 13184), (1648, 12128), (3032, 6592), (3296, 6064)]