21278404

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:137

約数の個数: 96

約数和(自身を含む): 49029120

約数和(自身を除く): 27750716

約数列:

[1, 2, 4, 7, 14, 19, 23, 28, 37, 38, 46, 47, 74, 76, 92, 94, 133, 148, 161, 188, 259, 266, 322, 329, 437, 518, 532, 644, 658, 703, 851, 874, 893, 1036, 1081, 1316, 1406, 1702, 1739, 1748, 1786, 2162, 2812, 3059, 3404, 3478, 3572, 4324, 4921, 5957, 6118, 6251, 6956, 7567, 9842, 11914, 12173, 12236, 12502, 15134, 16169, 19684, 20539, 23828, 24346, 25004, 30268, 32338, 33041, 39997, 41078, 48692, 64676, 66082, 79994, 82156, 113183, 132164, 143773, 159988, 226366, 231287, 279979, 287546, 452732, 462574, 559958, 575092, 759943, 925148, 1119916, 1519886, 3039772, 5319601, 10639202, 21278404]

約数ペア:

[(1, 21278404), (2, 10639202), (4, 5319601), (7, 3039772), (14, 1519886), (19, 1119916), (23, 925148), (28, 759943), (37, 575092), (38, 559958), (46, 462574), (47, 452732), (74, 287546), (76, 279979), (92, 231287), (94, 226366), (133, 159988), (148, 143773), (161, 132164), (188, 113183), (259, 82156), (266, 79994), (322, 66082), (329, 64676), (437, 48692), (518, 41078), (532, 39997), (644, 33041), (658, 32338), (703, 30268), (851, 25004), (874, 24346), (893, 23828), (1036, 20539), (1081, 19684), (1316, 16169), (1406, 15134), (1702, 12502), (1739, 12236), (1748, 12173), (1786, 11914), (2162, 9842), (2812, 7567), (3059, 6956), (3404, 6251), (3478, 6118), (3572, 5957), (4324, 4921)]