20656804

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{157}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 43036672

約数和(自身を除く): 22379868

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 127, 148, 157, 254, 259, 314, 508, 518, 628, 889, 1036, 1099, 1778, 2198, 3556, 4396, 4699, 5809, 9398, 11618, 18796, 19939, 23236, 32893, 39878, 40663, 65786, 79756, 81326, 131572, 139573, 162652, 279146, 558292, 737743, 1475486, 2950972, 5164201, 10328402, 20656804]

約数ペア:

[(1, 20656804), (2, 10328402), (4, 5164201), (7, 2950972), (14, 1475486), (28, 737743), (37, 558292), (74, 279146), (127, 162652), (148, 139573), (157, 131572), (254, 81326), (259, 79756), (314, 65786), (508, 40663), (518, 39878), (628, 32893), (889, 23236), (1036, 19939), (1099, 18796), (1778, 11618), (2198, 9398), (3556, 5809), (4396, 4699)]