21818775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{499}}^1$

素因数の和:576

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 18357225

約数列:

[1, 3, 5, 11, 15, 25, 33, 53, 55, 75, 159, 165, 265, 275, 499, 583, 795, 825, 1325, 1497, 1749, 2495, 2915, 3975, 5489, 7485, 8745, 12475, 14575, 16467, 26447, 27445, 37425, 43725, 79341, 82335, 132235, 137225, 290917, 396705, 411675, 661175, 872751, 1454585, 1983525, 4363755, 7272925, 21818775]

約数ペア:

[(1, 21818775), (3, 7272925), (5, 4363755), (11, 1983525), (15, 1454585), (25, 872751), (33, 661175), (53, 411675), (55, 396705), (75, 290917), (159, 137225), (165, 132235), (265, 82335), (275, 79341), (499, 43725), (583, 37425), (795, 27445), (825, 26447), (1325, 16467), (1497, 14575), (1749, 12475), (2495, 8745), (2915, 7485), (3975, 5489)]