18021250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1109}}^1$

素因数の和:1144

約数の個数: 40

約数和(自身を含む): 36410220

約数和(自身を除く): 18388970

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1109, 1250, 1625, 2218, 3250, 5545, 8125, 11090, 14417, 16250, 27725, 28834, 55450, 72085, 138625, 144170, 277250, 360425, 693125, 720850, 1386250, 1802125, 3604250, 9010625, 18021250]

約数ペア:

[(1, 18021250), (2, 9010625), (5, 3604250), (10, 1802125), (13, 1386250), (25, 720850), (26, 693125), (50, 360425), (65, 277250), (125, 144170), (130, 138625), (250, 72085), (325, 55450), (625, 28834), (650, 27725), (1109, 16250), (1250, 14417), (1625, 11090), (2218, 8125), (3250, 5545)]