21071988

素因数分解:

$2^2\times 3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1$

素因数の和:208

約数の個数: 144

約数和(自身を含む): 66859520

約数和(自身を除く): 45787532

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 27, 28, 36, 38, 42, 54, 57, 63, 76, 81, 84, 108, 114, 126, 133, 162, 163, 171, 189, 228, 243, 252, 266, 324, 326, 342, 378, 399, 486, 489, 513, 532, 567, 652, 684, 756, 798, 972, 978, 1026, 1134, 1141, 1197, 1467, 1539, 1596, 1701, 1956, 2052, 2268, 2282, 2394, 2934, 3078, 3097, 3402, 3423, 3591, 4401, 4564, 4617, 4788, 5868, 6156, 6194, 6804, 6846, 7182, 8802, 9234, 9291, 10269, 10773, 12388, 13203, 13692, 14364, 17604, 18468, 18582, 20538, 21546, 21679, 26406, 27873, 30807, 32319, 37164, 39609, 41076, 43092, 43358, 52812, 55746, 61614, 64638, 65037, 79218, 83619, 86716, 92421, 111492, 123228, 129276, 130074, 158436, 167238, 184842, 195111, 250857, 260148, 277263, 334476, 369684, 390222, 501714, 554526, 585333, 752571, 780444, 1003428, 1109052, 1170666, 1505142, 1755999, 2341332, 3010284, 3511998, 5267997, 7023996, 10535994, 21071988]

約数ペア:

[(1, 21071988), (2, 10535994), (3, 7023996), (4, 5267997), (6, 3511998), (7, 3010284), (9, 2341332), (12, 1755999), (14, 1505142), (18, 1170666), (19, 1109052), (21, 1003428), (27, 780444), (28, 752571), (36, 585333), (38, 554526), (42, 501714), (54, 390222), (57, 369684), (63, 334476), (76, 277263), (81, 260148), (84, 250857), (108, 195111), (114, 184842), (126, 167238), (133, 158436), (162, 130074), (163, 129276), (171, 123228), (189, 111492), (228, 92421), (243, 86716), (252, 83619), (266, 79218), (324, 65037), (326, 64638), (342, 61614), (378, 55746), (399, 52812), (486, 43358), (489, 43092), (513, 41076), (532, 39609), (567, 37164), (652, 32319), (684, 30807), (756, 27873), (798, 26406), (972, 21679), (978, 21546), (1026, 20538), (1134, 18582), (1141, 18468), (1197, 17604), (1467, 14364), (1539, 13692), (1596, 13203), (1701, 12388), (1956, 10773), (2052, 10269), (2268, 9291), (2282, 9234), (2394, 8802), (2934, 7182), (3078, 6846), (3097, 6804), (3402, 6194), (3423, 6156), (3591, 5868), (4401, 4788), (4564, 4617)]