21490938

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{191}}^1$

素因数の和:272

約数の個数: 96

約数和(自身を含む): 57507840

約数和(自身を除く): 36016902

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 38, 42, 47, 57, 63, 94, 114, 126, 133, 141, 171, 191, 266, 282, 329, 342, 382, 399, 423, 573, 658, 798, 846, 893, 987, 1146, 1197, 1337, 1719, 1786, 1974, 2394, 2674, 2679, 2961, 3438, 3629, 4011, 5358, 5922, 6251, 7258, 8022, 8037, 8977, 10887, 12033, 12502, 16074, 17954, 18753, 21774, 24066, 25403, 26931, 32661, 37506, 50806, 53862, 56259, 62839, 65322, 76209, 80793, 112518, 125678, 152418, 161586, 170563, 188517, 228627, 341126, 377034, 457254, 511689, 565551, 1023378, 1131102, 1193941, 1535067, 2387882, 3070134, 3581823, 7163646, 10745469, 21490938]

約数ペア:

[(1, 21490938), (2, 10745469), (3, 7163646), (6, 3581823), (7, 3070134), (9, 2387882), (14, 1535067), (18, 1193941), (19, 1131102), (21, 1023378), (38, 565551), (42, 511689), (47, 457254), (57, 377034), (63, 341126), (94, 228627), (114, 188517), (126, 170563), (133, 161586), (141, 152418), (171, 125678), (191, 112518), (266, 80793), (282, 76209), (329, 65322), (342, 62839), (382, 56259), (399, 53862), (423, 50806), (573, 37506), (658, 32661), (798, 26931), (846, 25403), (893, 24066), (987, 21774), (1146, 18753), (1197, 17954), (1337, 16074), (1719, 12502), (1786, 12033), (1974, 10887), (2394, 8977), (2674, 8037), (2679, 8022), (2961, 7258), (3438, 6251), (3629, 5922), (4011, 5358)]