28380105

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 55211520

約数和(自身を除く): 26831415

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 103, 117, 135, 157, 195, 309, 351, 471, 515, 585, 785, 927, 1339, 1413, 1545, 1755, 2041, 2355, 2781, 4017, 4239, 4635, 6123, 6695, 7065, 10205, 12051, 13905, 16171, 18369, 20085, 21195, 30615, 36153, 48513, 55107, 60255, 80855, 91845, 145539, 180765, 210223, 242565, 275535, 436617, 630669, 727695, 1051115, 1892007, 2183085, 3153345, 5676021, 9460035, 28380105]

約数ペア:

[(1, 28380105), (3, 9460035), (5, 5676021), (9, 3153345), (13, 2183085), (15, 1892007), (27, 1051115), (39, 727695), (45, 630669), (65, 436617), (103, 275535), (117, 242565), (135, 210223), (157, 180765), (195, 145539), (309, 91845), (351, 80855), (471, 60255), (515, 55107), (585, 48513), (785, 36153), (927, 30615), (1339, 21195), (1413, 20085), (1545, 18369), (1755, 16171), (2041, 13905), (2355, 12051), (2781, 10205), (4017, 7065), (4239, 6695), (4635, 6123)]