21278292

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{137}}^1$

素因数の和:237

約数の個数: 72

約数和(自身を含む): 58516416

約数和(自身を除く): 37238124

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 43, 84, 86, 129, 137, 172, 258, 274, 301, 411, 516, 548, 602, 822, 903, 959, 1204, 1644, 1806, 1849, 1918, 2877, 3612, 3698, 3836, 5547, 5754, 5891, 7396, 11094, 11508, 11782, 12943, 17673, 22188, 23564, 25886, 35346, 38829, 41237, 51772, 70692, 77658, 82474, 123711, 155316, 164948, 247422, 253313, 494844, 506626, 759939, 1013252, 1519878, 1773191, 3039756, 3546382, 5319573, 7092764, 10639146, 21278292]

約数ペア:

[(1, 21278292), (2, 10639146), (3, 7092764), (4, 5319573), (6, 3546382), (7, 3039756), (12, 1773191), (14, 1519878), (21, 1013252), (28, 759939), (42, 506626), (43, 494844), (84, 253313), (86, 247422), (129, 164948), (137, 155316), (172, 123711), (258, 82474), (274, 77658), (301, 70692), (411, 51772), (516, 41237), (548, 38829), (602, 35346), (822, 25886), (903, 23564), (959, 22188), (1204, 17673), (1644, 12943), (1806, 11782), (1849, 11508), (1918, 11094), (2877, 7396), (3612, 5891), (3698, 5754), (3836, 5547)]