217765940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1555471}}^1$

素因数の和:1555487

約数の個数: 24

約数和(自身を含む): 522638592

約数和(自身を除く): 304872652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1555471, 3110942, 6221884, 7777355, 10888297, 15554710, 21776594, 31109420, 43553188, 54441485, 108882970, 217765940]

約数ペア:

[(1, 217765940), (2, 108882970), (4, 54441485), (5, 43553188), (7, 31109420), (10, 21776594), (14, 15554710), (20, 10888297), (28, 7777355), (35, 6221884), (70, 3110942), (140, 1555471)]