640444150

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{297881}}^1$

素因数の和:297936

約数の個数: 24

約数和(自身を含む): 1218933144

約数和(自身を除く): 578488994

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 215, 430, 1075, 2150, 297881, 595762, 1489405, 2978810, 7447025, 12808883, 14894050, 25617766, 64044415, 128088830, 320222075, 640444150]

約数ペア:

[(1, 640444150), (2, 320222075), (5, 128088830), (10, 64044415), (25, 25617766), (43, 14894050), (50, 12808883), (86, 7447025), (215, 2978810), (430, 1489405), (1075, 595762), (2150, 297881)]