21000261807

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{233}}^1\times {\mathrm{499}}^1$

素因数の和:853

約数の個数: 96

約数和(自身を含む): 36211968000

約数和(自身を除く): 15211706193

約数列:

[1, 3, 7, 9, 21, 47, 61, 63, 141, 183, 233, 329, 423, 427, 499, 549, 699, 987, 1281, 1497, 1631, 2097, 2867, 2961, 3493, 3843, 4491, 4893, 8601, 10479, 10951, 14213, 14679, 20069, 23453, 25803, 30439, 31437, 32853, 42639, 60207, 70359, 76657, 91317, 98559, 99491, 116267, 127917, 164171, 180621, 211077, 213073, 229971, 273951, 298473, 348801, 492513, 639219, 668011, 689913, 813869, 895419, 1046403, 1430633, 1477539, 1917657, 2004033, 2441607, 4291899, 4676077, 5464549, 6012099, 7092287, 7324821, 10014431, 12875697, 14028231, 16393647, 21276861, 30043293, 38251843, 42084693, 49180941, 49646009, 63830583, 90129879, 114755529, 148938027, 333337489, 344266587, 446814081, 1000012467, 2333362423, 3000037401, 7000087269, 21000261807]

約数ペア:

[(1, 21000261807), (3, 7000087269), (7, 3000037401), (9, 2333362423), (21, 1000012467), (47, 446814081), (61, 344266587), (63, 333337489), (141, 148938027), (183, 114755529), (233, 90129879), (329, 63830583), (423, 49646009), (427, 49180941), (499, 42084693), (549, 38251843), (699, 30043293), (987, 21276861), (1281, 16393647), (1497, 14028231), (1631, 12875697), (2097, 10014431), (2867, 7324821), (2961, 7092287), (3493, 6012099), (3843, 5464549), (4491, 4676077), (4893, 4291899), (8601, 2441607), (10479, 2004033), (10951, 1917657), (14213, 1477539), (14679, 1430633), (20069, 1046403), (23453, 895419), (25803, 813869), (30439, 689913), (31437, 668011), (32853, 639219), (42639, 492513), (60207, 348801), (70359, 298473), (76657, 273951), (91317, 229971), (98559, 213073), (99491, 211077), (116267, 180621), (127917, 164171)]