21471990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{4391}}^1$

素因数の和:4564

約数の個数: 32

約数和(自身を含む): 51860736

約数和(自身を除く): 30388746

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 163, 326, 489, 815, 978, 1630, 2445, 4391, 4890, 8782, 13173, 21955, 26346, 43910, 65865, 131730, 715733, 1431466, 2147199, 3578665, 4294398, 7157330, 10735995, 21471990]

約数ペア:

[(1, 21471990), (2, 10735995), (3, 7157330), (5, 4294398), (6, 3578665), (10, 2147199), (15, 1431466), (30, 715733), (163, 131730), (326, 65865), (489, 43910), (815, 26346), (978, 21955), (1630, 13173), (2445, 8782), (4391, 4890)]