21527865

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{263}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 40030848

約数和(自身を除く): 18502983

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 107, 153, 255, 263, 321, 535, 765, 789, 963, 1315, 1605, 1819, 2367, 3945, 4471, 4815, 5457, 9095, 11835, 13413, 16371, 22355, 27285, 28141, 40239, 67065, 81855, 84423, 140705, 201195, 253269, 422115, 478397, 1266345, 1435191, 2391985, 4305573, 7175955, 21527865]

約数ペア:

[(1, 21527865), (3, 7175955), (5, 4305573), (9, 2391985), (15, 1435191), (17, 1266345), (45, 478397), (51, 422115), (85, 253269), (107, 201195), (153, 140705), (255, 84423), (263, 81855), (321, 67065), (535, 40239), (765, 28141), (789, 27285), (963, 22355), (1315, 16371), (1605, 13413), (1819, 11835), (2367, 9095), (3945, 5457), (4471, 4815)]