21506856

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{313}}^1\times {\mathrm{409}}^1$

素因数の和:738

約数の個数: 64

約数和(自身を含む): 61795200

約数和(自身を除く): 40288344

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168, 313, 409, 626, 818, 939, 1227, 1252, 1636, 1878, 2191, 2454, 2504, 2863, 3272, 3756, 4382, 4908, 5726, 6573, 7512, 8589, 8764, 9816, 11452, 13146, 17178, 17528, 22904, 26292, 34356, 52584, 68712, 128017, 256034, 384051, 512068, 768102, 896119, 1024136, 1536204, 1792238, 2688357, 3072408, 3584476, 5376714, 7168952, 10753428, 21506856]

約数ペア:

[(1, 21506856), (2, 10753428), (3, 7168952), (4, 5376714), (6, 3584476), (7, 3072408), (8, 2688357), (12, 1792238), (14, 1536204), (21, 1024136), (24, 896119), (28, 768102), (42, 512068), (56, 384051), (84, 256034), (168, 128017), (313, 68712), (409, 52584), (626, 34356), (818, 26292), (939, 22904), (1227, 17528), (1252, 17178), (1636, 13146), (1878, 11452), (2191, 9816), (2454, 8764), (2504, 8589), (2863, 7512), (3272, 6573), (3756, 5726), (4382, 4908)]