21158775

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 42247296

約数和(自身を除く): 21088521

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 83, 99, 103, 165, 225, 249, 275, 309, 415, 495, 515, 747, 825, 913, 927, 1133, 1245, 1545, 2075, 2475, 2575, 2739, 3399, 3735, 4565, 4635, 5665, 6225, 7725, 8217, 8549, 10197, 13695, 16995, 18675, 22825, 23175, 25647, 28325, 41085, 42745, 50985, 68475, 76941, 84975, 94039, 128235, 205425, 213725, 254925, 282117, 384705, 470195, 641175, 846351, 1410585, 1923525, 2350975, 4231755, 7052925, 21158775]

約数ペア:

[(1, 21158775), (3, 7052925), (5, 4231755), (9, 2350975), (11, 1923525), (15, 1410585), (25, 846351), (33, 641175), (45, 470195), (55, 384705), (75, 282117), (83, 254925), (99, 213725), (103, 205425), (165, 128235), (225, 94039), (249, 84975), (275, 76941), (309, 68475), (415, 50985), (495, 42745), (515, 41085), (747, 28325), (825, 25647), (913, 23175), (927, 22825), (1133, 18675), (1245, 16995), (1545, 13695), (2075, 10197), (2475, 8549), (2575, 8217), (2739, 7725), (3399, 6225), (3735, 5665), (4565, 4635)]