21978540

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13567}}^1$

素因数の和:13588

約数の個数: 60

約数和(自身を含む): 68952576

約数和(自身を除く): 46974036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 13567, 27134, 40701, 54268, 67835, 81402, 122103, 135670, 162804, 203505, 244206, 271340, 366309, 407010, 488412, 610515, 732618, 814020, 1098927, 1221030, 1465236, 1831545, 2197854, 2442060, 3663090, 4395708, 5494635, 7326180, 10989270, 21978540]

約数ペア:

[(1, 21978540), (2, 10989270), (3, 7326180), (4, 5494635), (5, 4395708), (6, 3663090), (9, 2442060), (10, 2197854), (12, 1831545), (15, 1465236), (18, 1221030), (20, 1098927), (27, 814020), (30, 732618), (36, 610515), (45, 488412), (54, 407010), (60, 366309), (81, 271340), (90, 244206), (108, 203505), (135, 162804), (162, 135670), (180, 122103), (270, 81402), (324, 67835), (405, 54268), (540, 40701), (810, 27134), (1620, 13567)]