20989875

素因数分解:

$3^1\times 5^3\times {\mathrm{223}}^1\times {\mathrm{251}}^1$

素因数の和:492

約数の個数: 32

約数和(自身を含む): 35223552

約数和(自身を除く): 14233677

約数列:

[1, 3, 5, 15, 25, 75, 125, 223, 251, 375, 669, 753, 1115, 1255, 3345, 3765, 5575, 6275, 16725, 18825, 27875, 31375, 55973, 83625, 94125, 167919, 279865, 839595, 1399325, 4197975, 6996625, 20989875]

約数ペア:

[(1, 20989875), (3, 6996625), (5, 4197975), (15, 1399325), (25, 839595), (75, 279865), (125, 167919), (223, 94125), (251, 83625), (375, 55973), (669, 31375), (753, 27875), (1115, 18825), (1255, 16725), (3345, 6275), (3765, 5575)]