19998286

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:181

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 19814834

約数列:

[1, 2, 7, 11, 14, 22, 31, 59, 62, 71, 77, 118, 142, 154, 217, 341, 413, 434, 497, 649, 682, 781, 826, 994, 1298, 1562, 1829, 2201, 2387, 3658, 4189, 4402, 4543, 4774, 5467, 8378, 9086, 10934, 12803, 15407, 20119, 24211, 25606, 29323, 30814, 40238, 46079, 48422, 58646, 92158, 129859, 140833, 169477, 259718, 281666, 322553, 338954, 645106, 909013, 1428449, 1818026, 2856898, 9999143, 19998286]

約数ペア:

[(1, 19998286), (2, 9999143), (7, 2856898), (11, 1818026), (14, 1428449), (22, 909013), (31, 645106), (59, 338954), (62, 322553), (71, 281666), (77, 259718), (118, 169477), (142, 140833), (154, 129859), (217, 92158), (341, 58646), (413, 48422), (434, 46079), (497, 40238), (649, 30814), (682, 29323), (781, 25606), (826, 24211), (994, 20119), (1298, 15407), (1562, 12803), (1829, 10934), (2201, 9086), (2387, 8378), (3658, 5467), (4189, 4774), (4402, 4543)]