20831720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:187

約数の個数: 128

約数和(自身を含む): 59270400

約数和(自身を除く): 38438680

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 59, 65, 70, 91, 97, 104, 118, 130, 140, 182, 194, 236, 260, 280, 295, 364, 388, 413, 455, 472, 485, 520, 590, 679, 728, 767, 776, 826, 910, 970, 1180, 1261, 1358, 1534, 1652, 1820, 1940, 2065, 2360, 2522, 2716, 3068, 3304, 3395, 3640, 3835, 3880, 4130, 5044, 5369, 5432, 5723, 6136, 6305, 6790, 7670, 8260, 8827, 10088, 10738, 11446, 12610, 13580, 15340, 16520, 17654, 21476, 22892, 25220, 26845, 27160, 28615, 30680, 35308, 40061, 42952, 44135, 45784, 50440, 53690, 57230, 70616, 74399, 80122, 88270, 107380, 114460, 148798, 160244, 176540, 200305, 214760, 228920, 297596, 320488, 353080, 371995, 400610, 520793, 595192, 743990, 801220, 1041586, 1487980, 1602440, 2083172, 2603965, 2975960, 4166344, 5207930, 10415860, 20831720]

約数ペア:

[(1, 20831720), (2, 10415860), (4, 5207930), (5, 4166344), (7, 2975960), (8, 2603965), (10, 2083172), (13, 1602440), (14, 1487980), (20, 1041586), (26, 801220), (28, 743990), (35, 595192), (40, 520793), (52, 400610), (56, 371995), (59, 353080), (65, 320488), (70, 297596), (91, 228920), (97, 214760), (104, 200305), (118, 176540), (130, 160244), (140, 148798), (182, 114460), (194, 107380), (236, 88270), (260, 80122), (280, 74399), (295, 70616), (364, 57230), (388, 53690), (413, 50440), (455, 45784), (472, 44135), (485, 42952), (520, 40061), (590, 35308), (679, 30680), (728, 28615), (767, 27160), (776, 26845), (826, 25220), (910, 22892), (970, 21476), (1180, 17654), (1261, 16520), (1358, 15340), (1534, 13580), (1652, 12610), (1820, 11446), (1940, 10738), (2065, 10088), (2360, 8827), (2522, 8260), (2716, 7670), (3068, 6790), (3304, 6305), (3395, 6136), (3640, 5723), (3835, 5432), (3880, 5369), (4130, 5044)]