21649095

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1609}}^1$

素因数の和:1656

約数の個数: 48

約数和(自身を含む): 42194880

約数和(自身を除く): 20545785

約数列:

[1, 3, 5, 9, 13, 15, 23, 39, 45, 65, 69, 115, 117, 195, 207, 299, 345, 585, 897, 1035, 1495, 1609, 2691, 4485, 4827, 8045, 13455, 14481, 20917, 24135, 37007, 62751, 72405, 104585, 111021, 185035, 188253, 313755, 333063, 481091, 555105, 941265, 1443273, 1665315, 2405455, 4329819, 7216365, 21649095]

約数ペア:

[(1, 21649095), (3, 7216365), (5, 4329819), (9, 2405455), (13, 1665315), (15, 1443273), (23, 941265), (39, 555105), (45, 481091), (65, 333063), (69, 313755), (115, 188253), (117, 185035), (195, 111021), (207, 104585), (299, 72405), (345, 62751), (585, 37007), (897, 24135), (1035, 20917), (1495, 14481), (1609, 13455), (2691, 8045), (4485, 4827)]