21205245

素因数分解:

$3^1\times 5^1\times {\mathrm{883}}^1\times {\mathrm{1601}}^1$

素因数の和:2492

約数の個数: 16

約数和(自身を含む): 33988032

約数和(自身を除く): 12782787

約数列:

[1, 3, 5, 15, 883, 1601, 2649, 4415, 4803, 8005, 13245, 24015, 1413683, 4241049, 7068415, 21205245]

約数ペア:

[(1, 21205245), (3, 7068415), (5, 4241049), (15, 1413683), (883, 24015), (1601, 13245), (2649, 8005), (4415, 4803)]