19990240

素因数分解:

$2^5\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1213}}^1$

素因数の和:1331

約数の個数: 48

約数和(自身を含む): 47724768

約数和(自身を除く): 27734528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 103, 160, 206, 412, 515, 824, 1030, 1213, 1648, 2060, 2426, 3296, 4120, 4852, 6065, 8240, 9704, 12130, 16480, 19408, 24260, 38816, 48520, 97040, 124939, 194080, 249878, 499756, 624695, 999512, 1249390, 1999024, 2498780, 3998048, 4997560, 9995120, 19990240]

約数ペア:

[(1, 19990240), (2, 9995120), (4, 4997560), (5, 3998048), (8, 2498780), (10, 1999024), (16, 1249390), (20, 999512), (32, 624695), (40, 499756), (80, 249878), (103, 194080), (160, 124939), (206, 97040), (412, 48520), (515, 38816), (824, 24260), (1030, 19408), (1213, 16480), (1648, 12130), (2060, 9704), (2426, 8240), (3296, 6065), (4120, 4852)]