21780954

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 36279846

約数列:

[1, 2, 3, 6, 9, 13, 18, 19, 23, 26, 27, 38, 39, 46, 54, 57, 69, 71, 78, 114, 117, 138, 142, 171, 207, 213, 234, 247, 299, 342, 351, 414, 426, 437, 494, 513, 598, 621, 639, 702, 741, 874, 897, 923, 1026, 1242, 1278, 1311, 1349, 1482, 1633, 1794, 1846, 1917, 2223, 2622, 2691, 2698, 2769, 3266, 3834, 3933, 4047, 4446, 4899, 5382, 5538, 5681, 6669, 7866, 8073, 8094, 8307, 9798, 11362, 11799, 12141, 13338, 14697, 16146, 16614, 17043, 17537, 21229, 23598, 24282, 24921, 29394, 31027, 34086, 35074, 36423, 42458, 44091, 49842, 51129, 52611, 62054, 63687, 72846, 88182, 93081, 102258, 105222, 127374, 153387, 157833, 186162, 191061, 279243, 306774, 315666, 382122, 403351, 473499, 558486, 573183, 806702, 837729, 946998, 1146366, 1210053, 1675458, 2420106, 3630159, 7260318, 10890477, 21780954]

約数ペア:

[(1, 21780954), (2, 10890477), (3, 7260318), (6, 3630159), (9, 2420106), (13, 1675458), (18, 1210053), (19, 1146366), (23, 946998), (26, 837729), (27, 806702), (38, 573183), (39, 558486), (46, 473499), (54, 403351), (57, 382122), (69, 315666), (71, 306774), (78, 279243), (114, 191061), (117, 186162), (138, 157833), (142, 153387), (171, 127374), (207, 105222), (213, 102258), (234, 93081), (247, 88182), (299, 72846), (342, 63687), (351, 62054), (414, 52611), (426, 51129), (437, 49842), (494, 44091), (513, 42458), (598, 36423), (621, 35074), (639, 34086), (702, 31027), (741, 29394), (874, 24921), (897, 24282), (923, 23598), (1026, 21229), (1242, 17537), (1278, 17043), (1311, 16614), (1349, 16146), (1482, 14697), (1633, 13338), (1794, 12141), (1846, 11799), (1917, 11362), (2223, 9798), (2622, 8307), (2691, 8094), (2698, 8073), (2769, 7866), (3266, 6669), (3834, 5681), (3933, 5538), (4047, 5382), (4446, 4899)]