19983860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{761}}^1$

素因数の和:884

約数の個数: 48

約数和(自身を含む): 45701712

約数和(自身を除く): 25717852

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 101, 130, 202, 260, 404, 505, 761, 1010, 1313, 1522, 2020, 2626, 3044, 3805, 5252, 6565, 7610, 9893, 13130, 15220, 19786, 26260, 39572, 49465, 76861, 98930, 153722, 197860, 307444, 384305, 768610, 999193, 1537220, 1998386, 3996772, 4995965, 9991930, 19983860]

約数ペア:

[(1, 19983860), (2, 9991930), (4, 4995965), (5, 3996772), (10, 1998386), (13, 1537220), (20, 999193), (26, 768610), (52, 384305), (65, 307444), (101, 197860), (130, 153722), (202, 98930), (260, 76861), (404, 49465), (505, 39572), (761, 26260), (1010, 19786), (1313, 15220), (1522, 13130), (2020, 9893), (2626, 7610), (3044, 6565), (3805, 5252)]