21489015

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{313}}^1$

素因数の和:543

約数の個数: 32

約数和(自身を含む): 36172800

約数和(自身を除く): 14683785

約数列:

[1, 3, 5, 15, 23, 69, 115, 199, 313, 345, 597, 939, 995, 1565, 2985, 4577, 4695, 7199, 13731, 21597, 22885, 35995, 62287, 68655, 107985, 186861, 311435, 934305, 1432601, 4297803, 7163005, 21489015]

約数ペア:

[(1, 21489015), (3, 7163005), (5, 4297803), (15, 1432601), (23, 934305), (69, 311435), (115, 186861), (199, 107985), (313, 68655), (345, 62287), (597, 35995), (939, 22885), (995, 21597), (1565, 13731), (2985, 7199), (4577, 4695)]