21297015

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12791}}^1$

素因数の和:12839

約数の個数: 24

約数和(自身を含む): 37915488

約数和(自身を除く): 16618473

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12791, 38373, 63955, 115119, 191865, 473267, 575595, 1419801, 2366335, 4259403, 7099005, 21297015]

約数ペア:

[(1, 21297015), (3, 7099005), (5, 4259403), (9, 2366335), (15, 1419801), (37, 575595), (45, 473267), (111, 191865), (185, 115119), (333, 63955), (555, 38373), (1665, 12791)]