21328920

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{227}}^1$

素因数の和:279

約数の個数: 160

約数和(自身を含む): 74487600

約数和(自身を除く): 53158680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 29, 30, 36, 40, 45, 54, 58, 60, 72, 81, 87, 90, 108, 116, 120, 135, 145, 162, 174, 180, 216, 227, 232, 261, 270, 290, 324, 348, 360, 405, 435, 454, 522, 540, 580, 648, 681, 696, 783, 810, 870, 908, 1044, 1080, 1135, 1160, 1305, 1362, 1566, 1620, 1740, 1816, 2043, 2088, 2270, 2349, 2610, 2724, 3132, 3240, 3405, 3480, 3915, 4086, 4540, 4698, 5220, 5448, 6129, 6264, 6583, 6810, 7830, 8172, 9080, 9396, 10215, 10440, 11745, 12258, 13166, 13620, 15660, 16344, 18387, 18792, 19749, 20430, 23490, 24516, 26332, 27240, 30645, 31320, 32915, 36774, 39498, 40860, 46980, 49032, 52664, 59247, 61290, 65830, 73548, 78996, 81720, 91935, 93960, 98745, 118494, 122580, 131660, 147096, 157992, 177741, 183870, 197490, 236988, 245160, 263320, 296235, 355482, 367740, 394980, 473976, 533223, 592470, 710964, 735480, 789960, 888705, 1066446, 1184940, 1421928, 1777410, 2132892, 2369880, 2666115, 3554820, 4265784, 5332230, 7109640, 10664460, 21328920]

約数ペア:

[(1, 21328920), (2, 10664460), (3, 7109640), (4, 5332230), (5, 4265784), (6, 3554820), (8, 2666115), (9, 2369880), (10, 2132892), (12, 1777410), (15, 1421928), (18, 1184940), (20, 1066446), (24, 888705), (27, 789960), (29, 735480), (30, 710964), (36, 592470), (40, 533223), (45, 473976), (54, 394980), (58, 367740), (60, 355482), (72, 296235), (81, 263320), (87, 245160), (90, 236988), (108, 197490), (116, 183870), (120, 177741), (135, 157992), (145, 147096), (162, 131660), (174, 122580), (180, 118494), (216, 98745), (227, 93960), (232, 91935), (261, 81720), (270, 78996), (290, 73548), (324, 65830), (348, 61290), (360, 59247), (405, 52664), (435, 49032), (454, 46980), (522, 40860), (540, 39498), (580, 36774), (648, 32915), (681, 31320), (696, 30645), (783, 27240), (810, 26332), (870, 24516), (908, 23490), (1044, 20430), (1080, 19749), (1135, 18792), (1160, 18387), (1305, 16344), (1362, 15660), (1566, 13620), (1620, 13166), (1740, 12258), (1816, 11745), (2043, 10440), (2088, 10215), (2270, 9396), (2349, 9080), (2610, 8172), (2724, 7830), (3132, 6810), (3240, 6583), (3405, 6264), (3480, 6129), (3915, 5448), (4086, 5220), (4540, 4698)]