21849165

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^4\times {\mathrm{17}}^1$

素因数の和:80

約数の個数: 60

約数和(自身を含む): 43441164

約数和(自身を除く): 21591999

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 169, 195, 221, 255, 507, 585, 663, 765, 845, 1105, 1521, 1989, 2197, 2535, 2873, 3315, 6591, 7605, 8619, 9945, 10985, 14365, 19773, 25857, 28561, 32955, 37349, 43095, 85683, 98865, 112047, 129285, 142805, 186745, 257049, 336141, 428415, 485537, 560235, 1285245, 1456611, 1680705, 2427685, 4369833, 7283055, 21849165]

約数ペア:

[(1, 21849165), (3, 7283055), (5, 4369833), (9, 2427685), (13, 1680705), (15, 1456611), (17, 1285245), (39, 560235), (45, 485537), (51, 428415), (65, 336141), (85, 257049), (117, 186745), (153, 142805), (169, 129285), (195, 112047), (221, 98865), (255, 85683), (507, 43095), (585, 37349), (663, 32955), (765, 28561), (845, 25857), (1105, 19773), (1521, 14365), (1989, 10985), (2197, 9945), (2535, 8619), (2873, 7605), (3315, 6591)]