21511280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{359}}^1$

素因数の和:486

約数の個数: 80

約数和(自身を含む): 57853440

約数和(自身を除く): 36342160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 107, 112, 140, 214, 280, 359, 428, 535, 560, 718, 749, 856, 1070, 1436, 1498, 1712, 1795, 2140, 2513, 2872, 2996, 3590, 3745, 4280, 5026, 5744, 5992, 7180, 7490, 8560, 10052, 11984, 12565, 14360, 14980, 20104, 25130, 28720, 29960, 38413, 40208, 50260, 59920, 76826, 100520, 153652, 192065, 201040, 268891, 307304, 384130, 537782, 614608, 768260, 1075564, 1344455, 1536520, 2151128, 2688910, 3073040, 4302256, 5377820, 10755640, 21511280]

約数ペア:

[(1, 21511280), (2, 10755640), (4, 5377820), (5, 4302256), (7, 3073040), (8, 2688910), (10, 2151128), (14, 1536520), (16, 1344455), (20, 1075564), (28, 768260), (35, 614608), (40, 537782), (56, 384130), (70, 307304), (80, 268891), (107, 201040), (112, 192065), (140, 153652), (214, 100520), (280, 76826), (359, 59920), (428, 50260), (535, 40208), (560, 38413), (718, 29960), (749, 28720), (856, 25130), (1070, 20104), (1436, 14980), (1498, 14360), (1712, 12565), (1795, 11984), (2140, 10052), (2513, 8560), (2872, 7490), (2996, 7180), (3590, 5992), (3745, 5744), (4280, 5026)]