20719550

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1$

素因数の和:497

約数の個数: 48

約数和(自身を含む): 41247360

約数和(自身を除く): 20527810

約数列:

[1, 2, 5, 10, 23, 25, 43, 46, 50, 86, 115, 215, 230, 419, 430, 575, 838, 989, 1075, 1150, 1978, 2095, 2150, 4190, 4945, 9637, 9890, 10475, 18017, 19274, 20950, 24725, 36034, 48185, 49450, 90085, 96370, 180170, 240925, 414391, 450425, 481850, 828782, 900850, 2071955, 4143910, 10359775, 20719550]

約数ペア:

[(1, 20719550), (2, 10359775), (5, 4143910), (10, 2071955), (23, 900850), (25, 828782), (43, 481850), (46, 450425), (50, 414391), (86, 240925), (115, 180170), (215, 96370), (230, 90085), (419, 49450), (430, 48185), (575, 36034), (838, 24725), (989, 20950), (1075, 19274), (1150, 18017), (1978, 10475), (2095, 9890), (2150, 9637), (4190, 4945)]