19981388

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 44593920

約数和(自身を除く): 24612532

約数列:

[1, 2, 4, 7, 14, 19, 23, 28, 38, 46, 71, 76, 92, 133, 142, 161, 266, 284, 322, 437, 497, 529, 532, 644, 874, 994, 1058, 1349, 1633, 1748, 1988, 2116, 2698, 3059, 3266, 3703, 5396, 6118, 6532, 7406, 9443, 10051, 11431, 12236, 14812, 18886, 20102, 22862, 31027, 37559, 37772, 40204, 45724, 62054, 70357, 75118, 124108, 140714, 150236, 217189, 262913, 281428, 434378, 525826, 713621, 868756, 1051652, 1427242, 2854484, 4995347, 9990694, 19981388]

約数ペア:

[(1, 19981388), (2, 9990694), (4, 4995347), (7, 2854484), (14, 1427242), (19, 1051652), (23, 868756), (28, 713621), (38, 525826), (46, 434378), (71, 281428), (76, 262913), (92, 217189), (133, 150236), (142, 140714), (161, 124108), (266, 75118), (284, 70357), (322, 62054), (437, 45724), (497, 40204), (529, 37772), (532, 37559), (644, 31027), (874, 22862), (994, 20102), (1058, 18886), (1349, 14812), (1633, 12236), (1748, 11431), (1988, 10051), (2116, 9443), (2698, 7406), (3059, 6532), (3266, 6118), (3703, 5396)]