18951680

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{673}}^1$

素因数の和:707

約数の個数: 80

約数和(自身を含む): 49644144

約数和(自身を除く): 30692464

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 673, 704, 880, 1280, 1346, 1408, 1760, 2560, 2692, 2816, 3365, 3520, 5384, 5632, 6730, 7040, 7403, 10768, 13460, 14080, 14806, 21536, 26920, 28160, 29612, 37015, 43072, 53840, 59224, 74030, 86144, 107680, 118448, 148060, 172288, 215360, 236896, 296120, 344576, 430720, 473792, 592240, 861440, 947584, 1184480, 1722880, 1895168, 2368960, 3790336, 4737920, 9475840, 18951680]

約数ペア:

[(1, 18951680), (2, 9475840), (4, 4737920), (5, 3790336), (8, 2368960), (10, 1895168), (11, 1722880), (16, 1184480), (20, 947584), (22, 861440), (32, 592240), (40, 473792), (44, 430720), (55, 344576), (64, 296120), (80, 236896), (88, 215360), (110, 172288), (128, 148060), (160, 118448), (176, 107680), (220, 86144), (256, 74030), (320, 59224), (352, 53840), (440, 43072), (512, 37015), (640, 29612), (673, 28160), (704, 26920), (880, 21536), (1280, 14806), (1346, 14080), (1408, 13460), (1760, 10768), (2560, 7403), (2692, 7040), (2816, 6730), (3365, 5632), (3520, 5384)]