21980010

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{56359}}^1$

素因数の和:56382

約数の個数: 32

約数和(自身を含む): 56810880

約数和(自身を除く): 34830870

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 56359, 112718, 169077, 281795, 338154, 563590, 732667, 845385, 1465334, 1690770, 2198001, 3663335, 4396002, 7326670, 10990005, 21980010]

約数ペア:

[(1, 21980010), (2, 10990005), (3, 7326670), (5, 4396002), (6, 3663335), (10, 2198001), (13, 1690770), (15, 1465334), (26, 845385), (30, 732667), (39, 563590), (65, 338154), (78, 281795), (130, 169077), (195, 112718), (390, 56359)]