21407120

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:197

約数の個数: 120

約数和(自身を含む): 59710464

約数和(自身を除く): 38303344

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 43, 49, 56, 70, 80, 86, 98, 112, 127, 140, 172, 196, 215, 245, 254, 280, 301, 344, 392, 430, 490, 508, 560, 602, 635, 688, 784, 860, 889, 980, 1016, 1204, 1270, 1505, 1720, 1778, 1960, 2032, 2107, 2408, 2540, 3010, 3440, 3556, 3920, 4214, 4445, 4816, 5080, 5461, 6020, 6223, 7112, 8428, 8890, 10160, 10535, 10922, 12040, 12446, 14224, 16856, 17780, 21070, 21844, 24080, 24892, 27305, 31115, 33712, 35560, 38227, 42140, 43688, 49784, 54610, 62230, 71120, 76454, 84280, 87376, 99568, 109220, 124460, 152908, 168560, 191135, 218440, 248920, 267589, 305816, 382270, 436880, 497840, 535178, 611632, 764540, 1070356, 1337945, 1529080, 2140712, 2675890, 3058160, 4281424, 5351780, 10703560, 21407120]

約数ペア:

[(1, 21407120), (2, 10703560), (4, 5351780), (5, 4281424), (7, 3058160), (8, 2675890), (10, 2140712), (14, 1529080), (16, 1337945), (20, 1070356), (28, 764540), (35, 611632), (40, 535178), (43, 497840), (49, 436880), (56, 382270), (70, 305816), (80, 267589), (86, 248920), (98, 218440), (112, 191135), (127, 168560), (140, 152908), (172, 124460), (196, 109220), (215, 99568), (245, 87376), (254, 84280), (280, 76454), (301, 71120), (344, 62230), (392, 54610), (430, 49784), (490, 43688), (508, 42140), (560, 38227), (602, 35560), (635, 33712), (688, 31115), (784, 27305), (860, 24892), (889, 24080), (980, 21844), (1016, 21070), (1204, 17780), (1270, 16856), (1505, 14224), (1720, 12446), (1778, 12040), (1960, 10922), (2032, 10535), (2107, 10160), (2408, 8890), (2540, 8428), (3010, 7112), (3440, 6223), (3556, 6020), (3920, 5461), (4214, 5080), (4445, 4816)]