18991008

素因数分解:

$2^5\times 3^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:147

約数の個数: 144

約数和(自身を含む): 58496256

約数和(自身を除く): 39505248

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 23, 24, 32, 36, 46, 47, 48, 61, 69, 72, 92, 94, 96, 122, 138, 141, 144, 183, 184, 188, 207, 244, 276, 282, 288, 366, 368, 376, 414, 423, 488, 549, 552, 564, 732, 736, 752, 828, 846, 976, 1081, 1098, 1104, 1128, 1403, 1464, 1504, 1656, 1692, 1952, 2162, 2196, 2208, 2256, 2806, 2867, 2928, 3243, 3312, 3384, 4209, 4324, 4392, 4512, 5612, 5734, 5856, 6486, 6624, 6768, 8418, 8601, 8648, 8784, 9729, 11224, 11468, 12627, 12972, 13536, 16836, 17202, 17296, 17568, 19458, 22448, 22936, 25254, 25803, 25944, 33672, 34404, 34592, 38916, 44896, 45872, 50508, 51606, 51888, 65941, 67344, 68808, 77832, 91744, 101016, 103212, 103776, 131882, 134688, 137616, 155664, 197823, 202032, 206424, 263764, 275232, 311328, 395646, 404064, 412848, 527528, 593469, 791292, 825696, 1055056, 1186938, 1582584, 2110112, 2373876, 3165168, 4747752, 6330336, 9495504, 18991008]

約数ペア:

[(1, 18991008), (2, 9495504), (3, 6330336), (4, 4747752), (6, 3165168), (8, 2373876), (9, 2110112), (12, 1582584), (16, 1186938), (18, 1055056), (23, 825696), (24, 791292), (32, 593469), (36, 527528), (46, 412848), (47, 404064), (48, 395646), (61, 311328), (69, 275232), (72, 263764), (92, 206424), (94, 202032), (96, 197823), (122, 155664), (138, 137616), (141, 134688), (144, 131882), (183, 103776), (184, 103212), (188, 101016), (207, 91744), (244, 77832), (276, 68808), (282, 67344), (288, 65941), (366, 51888), (368, 51606), (376, 50508), (414, 45872), (423, 44896), (488, 38916), (549, 34592), (552, 34404), (564, 33672), (732, 25944), (736, 25803), (752, 25254), (828, 22936), (846, 22448), (976, 19458), (1081, 17568), (1098, 17296), (1104, 17202), (1128, 16836), (1403, 13536), (1464, 12972), (1504, 12627), (1656, 11468), (1692, 11224), (1952, 9729), (2162, 8784), (2196, 8648), (2208, 8601), (2256, 8418), (2806, 6768), (2867, 6624), (2928, 6486), (3243, 5856), (3312, 5734), (3384, 5612), (4209, 4512), (4324, 4392)]