21000616

素因数分解:

$2^3\times 7^2\times {\mathrm{13}}^2\times {\mathrm{317}}^1$

素因数の和:363

約数の個数: 72

約数和(自身を含む): 49755870

約数和(自身を除く): 28755254

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 49, 52, 56, 91, 98, 104, 169, 182, 196, 317, 338, 364, 392, 634, 637, 676, 728, 1183, 1268, 1274, 1352, 2219, 2366, 2536, 2548, 4121, 4438, 4732, 5096, 8242, 8281, 8876, 9464, 15533, 16484, 16562, 17752, 28847, 31066, 32968, 33124, 53573, 57694, 62132, 66248, 107146, 115388, 124264, 201929, 214292, 230776, 375011, 403858, 428584, 750022, 807716, 1500044, 1615432, 2625077, 3000088, 5250154, 10500308, 21000616]

約数ペア:

[(1, 21000616), (2, 10500308), (4, 5250154), (7, 3000088), (8, 2625077), (13, 1615432), (14, 1500044), (26, 807716), (28, 750022), (49, 428584), (52, 403858), (56, 375011), (91, 230776), (98, 214292), (104, 201929), (169, 124264), (182, 115388), (196, 107146), (317, 66248), (338, 62132), (364, 57694), (392, 53573), (634, 33124), (637, 32968), (676, 31066), (728, 28847), (1183, 17752), (1268, 16562), (1274, 16484), (1352, 15533), (2219, 9464), (2366, 8876), (2536, 8281), (2548, 8242), (4121, 5096), (4438, 4732)]