19711250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1213}}^1$

素因数の和:1248

約数の個数: 40

約数和(自身を含む): 39821628

約数和(自身を除く): 20110378

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1213, 1250, 1625, 2426, 3250, 6065, 8125, 12130, 15769, 16250, 30325, 31538, 60650, 78845, 151625, 157690, 303250, 394225, 758125, 788450, 1516250, 1971125, 3942250, 9855625, 19711250]

約数ペア:

[(1, 19711250), (2, 9855625), (5, 3942250), (10, 1971125), (13, 1516250), (25, 788450), (26, 758125), (50, 394225), (65, 303250), (125, 157690), (130, 151625), (250, 78845), (325, 60650), (625, 31538), (650, 30325), (1213, 16250), (1250, 15769), (1625, 12130), (2426, 8125), (3250, 6065)]