21163212

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{613}}^1$

素因数の和:767

約数の個数: 72

約数和(自身を含む): 61684896

約数和(自身を除く): 40521684

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 137, 252, 274, 411, 548, 613, 822, 959, 1226, 1233, 1644, 1839, 1918, 2452, 2466, 2877, 3678, 3836, 4291, 4932, 5517, 5754, 7356, 8582, 8631, 11034, 11508, 12873, 17164, 17262, 22068, 25746, 34524, 38619, 51492, 77238, 83981, 154476, 167962, 251943, 335924, 503886, 587867, 755829, 1007772, 1175734, 1511658, 1763601, 2351468, 3023316, 3527202, 5290803, 7054404, 10581606, 21163212]

約数ペア:

[(1, 21163212), (2, 10581606), (3, 7054404), (4, 5290803), (6, 3527202), (7, 3023316), (9, 2351468), (12, 1763601), (14, 1511658), (18, 1175734), (21, 1007772), (28, 755829), (36, 587867), (42, 503886), (63, 335924), (84, 251943), (126, 167962), (137, 154476), (252, 83981), (274, 77238), (411, 51492), (548, 38619), (613, 34524), (822, 25746), (959, 22068), (1226, 17262), (1233, 17164), (1644, 12873), (1839, 11508), (1918, 11034), (2452, 8631), (2466, 8582), (2877, 7356), (3678, 5754), (3836, 5517), (4291, 4932)]