21813820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22259}}^1$

素因数の和:22282

約数の個数: 36

約数和(自身を含む): 53290440

約数和(自身を除く): 31476620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22259, 44518, 89036, 111295, 155813, 222590, 311626, 445180, 623252, 779065, 1090691, 1558130, 2181382, 3116260, 4362764, 5453455, 10906910, 21813820]

約数ペア:

[(1, 21813820), (2, 10906910), (4, 5453455), (5, 4362764), (7, 3116260), (10, 2181382), (14, 1558130), (20, 1090691), (28, 779065), (35, 623252), (49, 445180), (70, 311626), (98, 222590), (140, 155813), (196, 111295), (245, 89036), (490, 44518), (980, 22259)]