19886672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1427}}^1$

素因数の和:1515

約数の個数: 40

約数和(自身を含む): 42143136

約数和(自身を除く): 22256464

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1427, 1742, 2854, 3484, 5708, 6968, 11416, 13936, 18551, 22832, 37102, 74204, 95609, 148408, 191218, 296816, 382436, 764872, 1242917, 1529744, 2485834, 4971668, 9943336, 19886672]

約数ペア:

[(1, 19886672), (2, 9943336), (4, 4971668), (8, 2485834), (13, 1529744), (16, 1242917), (26, 764872), (52, 382436), (67, 296816), (104, 191218), (134, 148408), (208, 95609), (268, 74204), (536, 37102), (871, 22832), (1072, 18551), (1427, 13936), (1742, 11416), (2854, 6968), (3484, 5708)]