21720970

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{94439}}^1$

素因数の和:94469

約数の個数: 16

約数和(自身を含む): 40798080

約数和(自身を除く): 19077110

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 94439, 188878, 472195, 944390, 2172097, 4344194, 10860485, 21720970]

約数ペア:

[(1, 21720970), (2, 10860485), (5, 4344194), (10, 2172097), (23, 944390), (46, 472195), (115, 188878), (230, 94439)]