19965440

素因数分解:

$2^9\times 5^1\times {\mathrm{11}}^1\times {\mathrm{709}}^1$

素因数の和:743

約数の個数: 80

約数和(自身を含む): 52295760

約数和(自身を除く): 32330320

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, 704, 709, 880, 1280, 1408, 1418, 1760, 2560, 2816, 2836, 3520, 3545, 5632, 5672, 7040, 7090, 7799, 11344, 14080, 14180, 15598, 22688, 28160, 28360, 31196, 38995, 45376, 56720, 62392, 77990, 90752, 113440, 124784, 155980, 181504, 226880, 249568, 311960, 363008, 453760, 499136, 623920, 907520, 998272, 1247840, 1815040, 1996544, 2495680, 3993088, 4991360, 9982720, 19965440]

約数ペア:

[(1, 19965440), (2, 9982720), (4, 4991360), (5, 3993088), (8, 2495680), (10, 1996544), (11, 1815040), (16, 1247840), (20, 998272), (22, 907520), (32, 623920), (40, 499136), (44, 453760), (55, 363008), (64, 311960), (80, 249568), (88, 226880), (110, 181504), (128, 155980), (160, 124784), (176, 113440), (220, 90752), (256, 77990), (320, 62392), (352, 56720), (440, 45376), (512, 38995), (640, 31196), (704, 28360), (709, 28160), (880, 22688), (1280, 15598), (1408, 14180), (1418, 14080), (1760, 11344), (2560, 7799), (2816, 7090), (2836, 7040), (3520, 5672), (3545, 5632)]