21664656

素因数分解:

$2^4\times 3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 66620736

約数和(自身を除く): 44956080

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 36, 39, 48, 52, 71, 72, 78, 104, 117, 142, 144, 156, 163, 208, 213, 234, 284, 312, 326, 426, 468, 489, 568, 624, 639, 652, 852, 923, 936, 978, 1136, 1278, 1304, 1467, 1704, 1846, 1872, 1956, 2119, 2556, 2608, 2769, 2934, 3408, 3692, 3912, 4238, 5112, 5538, 5868, 6357, 7384, 7824, 8307, 8476, 10224, 11076, 11573, 11736, 12714, 14768, 16614, 16952, 19071, 22152, 23146, 23472, 25428, 33228, 33904, 34719, 38142, 44304, 46292, 50856, 66456, 69438, 76284, 92584, 101712, 104157, 132912, 138876, 150449, 152568, 185168, 208314, 277752, 300898, 305136, 416628, 451347, 555504, 601796, 833256, 902694, 1203592, 1354041, 1666512, 1805388, 2407184, 2708082, 3610776, 5416164, 7221552, 10832328, 21664656]

約数ペア:

[(1, 21664656), (2, 10832328), (3, 7221552), (4, 5416164), (6, 3610776), (8, 2708082), (9, 2407184), (12, 1805388), (13, 1666512), (16, 1354041), (18, 1203592), (24, 902694), (26, 833256), (36, 601796), (39, 555504), (48, 451347), (52, 416628), (71, 305136), (72, 300898), (78, 277752), (104, 208314), (117, 185168), (142, 152568), (144, 150449), (156, 138876), (163, 132912), (208, 104157), (213, 101712), (234, 92584), (284, 76284), (312, 69438), (326, 66456), (426, 50856), (468, 46292), (489, 44304), (568, 38142), (624, 34719), (639, 33904), (652, 33228), (852, 25428), (923, 23472), (936, 23146), (978, 22152), (1136, 19071), (1278, 16952), (1304, 16614), (1467, 14768), (1704, 12714), (1846, 11736), (1872, 11573), (1956, 11076), (2119, 10224), (2556, 8476), (2608, 8307), (2769, 7824), (2934, 7384), (3408, 6357), (3692, 5868), (3912, 5538), (4238, 5112)]