18201915

素因数分解:

$3^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 33336576

約数和(自身を除く): 15134661

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 211, 213, 243, 355, 405, 633, 639, 1055, 1065, 1215, 1899, 1917, 3165, 3195, 5697, 5751, 9495, 9585, 14981, 17091, 17253, 28485, 28755, 44943, 51273, 74905, 85455, 86265, 134829, 224715, 256365, 404487, 674145, 1213461, 2022435, 3640383, 6067305, 18201915]

約数ペア:

[(1, 18201915), (3, 6067305), (5, 3640383), (9, 2022435), (15, 1213461), (27, 674145), (45, 404487), (71, 256365), (81, 224715), (135, 134829), (211, 86265), (213, 85455), (243, 74905), (355, 51273), (405, 44943), (633, 28755), (639, 28485), (1055, 17253), (1065, 17091), (1215, 14981), (1899, 9585), (1917, 9495), (3165, 5751), (3195, 5697)]