642915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 1380288

約数和(自身を除く): 737373

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 157, 195, 273, 315, 455, 471, 585, 785, 819, 1099, 1365, 1413, 2041, 2355, 3297, 4095, 5495, 6123, 7065, 9891, 10205, 14287, 16485, 18369, 30615, 42861, 49455, 71435, 91845, 128583, 214305, 642915]

約数ペア:

[(1, 642915), (3, 214305), (5, 128583), (7, 91845), (9, 71435), (13, 49455), (15, 42861), (21, 30615), (35, 18369), (39, 16485), (45, 14287), (63, 10205), (65, 9891), (91, 7065), (105, 6123), (117, 5495), (157, 4095), (195, 3297), (273, 2355), (315, 2041), (455, 1413), (471, 1365), (585, 1099), (785, 819)]