19972498

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:347

約数の個数: 48

約数和(自身を含む): 38294424

約数和(自身を除く): 18321926

約数列:

[1, 2, 7, 13, 14, 26, 49, 61, 91, 98, 122, 182, 257, 427, 514, 637, 793, 854, 1274, 1586, 1799, 2989, 3341, 3598, 5551, 5978, 6682, 11102, 12593, 15677, 23387, 25186, 31354, 38857, 46774, 77714, 109739, 163709, 203801, 219478, 327418, 407602, 768173, 1426607, 1536346, 2853214, 9986249, 19972498]

約数ペア:

[(1, 19972498), (2, 9986249), (7, 2853214), (13, 1536346), (14, 1426607), (26, 768173), (49, 407602), (61, 327418), (91, 219478), (98, 203801), (122, 163709), (182, 109739), (257, 77714), (427, 46774), (514, 38857), (637, 31354), (793, 25186), (854, 23387), (1274, 15677), (1586, 12593), (1799, 11102), (2989, 6682), (3341, 5978), (3598, 5551)]