21072520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:287

約数の個数: 128

約数和(自身を含む): 60652800

約数和(自身を除く): 39580280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 19, 20, 28, 34, 35, 38, 40, 56, 68, 70, 76, 85, 95, 119, 133, 136, 140, 152, 170, 190, 233, 238, 266, 280, 323, 340, 380, 466, 476, 532, 595, 646, 665, 680, 760, 932, 952, 1064, 1165, 1190, 1292, 1330, 1615, 1631, 1864, 2261, 2330, 2380, 2584, 2660, 3230, 3262, 3961, 4427, 4522, 4660, 4760, 5320, 6460, 6524, 7922, 8155, 8854, 9044, 9320, 11305, 12920, 13048, 15844, 16310, 17708, 18088, 19805, 22135, 22610, 27727, 30989, 31688, 32620, 35416, 39610, 44270, 45220, 55454, 61978, 65240, 75259, 79220, 88540, 90440, 110908, 123956, 138635, 150518, 154945, 158440, 177080, 221816, 247912, 277270, 301036, 309890, 376295, 526813, 554540, 602072, 619780, 752590, 1053626, 1109080, 1239560, 1505180, 2107252, 2634065, 3010360, 4214504, 5268130, 10536260, 21072520]

約数ペア:

[(1, 21072520), (2, 10536260), (4, 5268130), (5, 4214504), (7, 3010360), (8, 2634065), (10, 2107252), (14, 1505180), (17, 1239560), (19, 1109080), (20, 1053626), (28, 752590), (34, 619780), (35, 602072), (38, 554540), (40, 526813), (56, 376295), (68, 309890), (70, 301036), (76, 277270), (85, 247912), (95, 221816), (119, 177080), (133, 158440), (136, 154945), (140, 150518), (152, 138635), (170, 123956), (190, 110908), (233, 90440), (238, 88540), (266, 79220), (280, 75259), (323, 65240), (340, 61978), (380, 55454), (466, 45220), (476, 44270), (532, 39610), (595, 35416), (646, 32620), (665, 31688), (680, 30989), (760, 27727), (932, 22610), (952, 22135), (1064, 19805), (1165, 18088), (1190, 17708), (1292, 16310), (1330, 15844), (1615, 13048), (1631, 12920), (1864, 11305), (2261, 9320), (2330, 9044), (2380, 8854), (2584, 8155), (2660, 7922), (3230, 6524), (3262, 6460), (3961, 5320), (4427, 4760), (4522, 4660)]