21742840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:165

約数の個数: 128

約数和(自身を含む): 60710400

約数和(自身を除く): 38967560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 61, 67, 70, 76, 95, 122, 133, 134, 140, 152, 190, 244, 266, 268, 280, 305, 335, 380, 427, 469, 488, 532, 536, 610, 665, 670, 760, 854, 938, 1064, 1159, 1220, 1273, 1330, 1340, 1708, 1876, 2135, 2318, 2345, 2440, 2546, 2660, 2680, 3416, 3752, 4087, 4270, 4636, 4690, 5092, 5320, 5795, 6365, 8113, 8174, 8540, 8911, 9272, 9380, 10184, 11590, 12730, 16226, 16348, 17080, 17822, 18760, 20435, 23180, 25460, 28609, 32452, 32696, 35644, 40565, 40870, 44555, 46360, 50920, 57218, 64904, 71288, 77653, 81130, 81740, 89110, 114436, 143045, 155306, 162260, 163480, 178220, 228872, 286090, 310612, 324520, 356440, 388265, 543571, 572180, 621224, 776530, 1087142, 1144360, 1553060, 2174284, 2717855, 3106120, 4348568, 5435710, 10871420, 21742840]

約数ペア:

[(1, 21742840), (2, 10871420), (4, 5435710), (5, 4348568), (7, 3106120), (8, 2717855), (10, 2174284), (14, 1553060), (19, 1144360), (20, 1087142), (28, 776530), (35, 621224), (38, 572180), (40, 543571), (56, 388265), (61, 356440), (67, 324520), (70, 310612), (76, 286090), (95, 228872), (122, 178220), (133, 163480), (134, 162260), (140, 155306), (152, 143045), (190, 114436), (244, 89110), (266, 81740), (268, 81130), (280, 77653), (305, 71288), (335, 64904), (380, 57218), (427, 50920), (469, 46360), (488, 44555), (532, 40870), (536, 40565), (610, 35644), (665, 32696), (670, 32452), (760, 28609), (854, 25460), (938, 23180), (1064, 20435), (1159, 18760), (1220, 17822), (1273, 17080), (1330, 16348), (1340, 16226), (1708, 12730), (1876, 11590), (2135, 10184), (2318, 9380), (2345, 9272), (2440, 8911), (2546, 8540), (2660, 8174), (2680, 8113), (3416, 6365), (3752, 5795), (4087, 5320), (4270, 5092), (4636, 4690)]