21471765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{523}}^1$

素因数の和:578

約数の個数: 64

約数和(自身を含む): 43462656

約数和(自身を除く): 21990891

約数列:

[1, 3, 5, 7, 15, 17, 21, 23, 35, 51, 69, 85, 105, 115, 119, 161, 255, 345, 357, 391, 483, 523, 595, 805, 1173, 1569, 1785, 1955, 2415, 2615, 2737, 3661, 5865, 7845, 8211, 8891, 10983, 12029, 13685, 18305, 26673, 36087, 41055, 44455, 54915, 60145, 62237, 84203, 133365, 180435, 186711, 204493, 252609, 311185, 421015, 613479, 933555, 1022465, 1263045, 1431451, 3067395, 4294353, 7157255, 21471765]

約数ペア:

[(1, 21471765), (3, 7157255), (5, 4294353), (7, 3067395), (15, 1431451), (17, 1263045), (21, 1022465), (23, 933555), (35, 613479), (51, 421015), (69, 311185), (85, 252609), (105, 204493), (115, 186711), (119, 180435), (161, 133365), (255, 84203), (345, 62237), (357, 60145), (391, 54915), (483, 44455), (523, 41055), (595, 36087), (805, 26673), (1173, 18305), (1569, 13685), (1785, 12029), (1955, 10983), (2415, 8891), (2615, 8211), (2737, 7845), (3661, 5865)]