81621435

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 158699520

約数和(自身を除く): 77078085

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 163, 251, 285, 399, 489, 665, 753, 815, 1141, 1255, 1757, 1995, 2445, 3097, 3423, 3765, 4769, 5271, 5705, 8785, 9291, 14307, 15485, 17115, 21679, 23845, 26355, 33383, 40913, 46455, 65037, 71535, 100149, 108395, 122739, 166915, 204565, 286391, 325185, 500745, 613695, 777347, 859173, 1431955, 2332041, 3886735, 4295865, 5441429, 11660205, 16324287, 27207145, 81621435]

約数ペア:

[(1, 81621435), (3, 27207145), (5, 16324287), (7, 11660205), (15, 5441429), (19, 4295865), (21, 3886735), (35, 2332041), (57, 1431955), (95, 859173), (105, 777347), (133, 613695), (163, 500745), (251, 325185), (285, 286391), (399, 204565), (489, 166915), (665, 122739), (753, 108395), (815, 100149), (1141, 71535), (1255, 65037), (1757, 46455), (1995, 40913), (2445, 33383), (3097, 26355), (3423, 23845), (3765, 21679), (4769, 17115), (5271, 15485), (5705, 14307), (8785, 9291)]