20542844

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 22357636

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 79, 148, 158, 251, 259, 316, 502, 518, 553, 1004, 1036, 1106, 1757, 2212, 2923, 3514, 5846, 7028, 9287, 11692, 18574, 19829, 20461, 37148, 39658, 40922, 65009, 79316, 81844, 130018, 138803, 260036, 277606, 555212, 733673, 1467346, 2934692, 5135711, 10271422, 20542844]

約数ペア:

[(1, 20542844), (2, 10271422), (4, 5135711), (7, 2934692), (14, 1467346), (28, 733673), (37, 555212), (74, 277606), (79, 260036), (148, 138803), (158, 130018), (251, 81844), (259, 79316), (316, 65009), (502, 40922), (518, 39658), (553, 37148), (1004, 20461), (1036, 19829), (1106, 18574), (1757, 11692), (2212, 9287), (2923, 7028), (3514, 5846)]