21720636

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:241

約数の個数: 120

約数和(自身を含む): 66377696

約数和(自身を除く): 44657060

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 61, 63, 81, 84, 108, 122, 126, 157, 162, 183, 189, 244, 252, 314, 324, 366, 378, 427, 471, 549, 567, 628, 732, 756, 854, 942, 1098, 1099, 1134, 1281, 1413, 1647, 1708, 1884, 2196, 2198, 2268, 2562, 2826, 3294, 3297, 3843, 4239, 4396, 4941, 5124, 5652, 6588, 6594, 7686, 8478, 9577, 9882, 9891, 11529, 12717, 13188, 15372, 16956, 19154, 19764, 19782, 23058, 25434, 28731, 29673, 34587, 38308, 39564, 46116, 50868, 57462, 59346, 67039, 69174, 86193, 89019, 114924, 118692, 134078, 138348, 172386, 178038, 201117, 258579, 268156, 344772, 356076, 402234, 517158, 603351, 775737, 804468, 1034316, 1206702, 1551474, 1810053, 2413404, 3102948, 3620106, 5430159, 7240212, 10860318, 21720636]

約数ペア:

[(1, 21720636), (2, 10860318), (3, 7240212), (4, 5430159), (6, 3620106), (7, 3102948), (9, 2413404), (12, 1810053), (14, 1551474), (18, 1206702), (21, 1034316), (27, 804468), (28, 775737), (36, 603351), (42, 517158), (54, 402234), (61, 356076), (63, 344772), (81, 268156), (84, 258579), (108, 201117), (122, 178038), (126, 172386), (157, 138348), (162, 134078), (183, 118692), (189, 114924), (244, 89019), (252, 86193), (314, 69174), (324, 67039), (366, 59346), (378, 57462), (427, 50868), (471, 46116), (549, 39564), (567, 38308), (628, 34587), (732, 29673), (756, 28731), (854, 25434), (942, 23058), (1098, 19782), (1099, 19764), (1134, 19154), (1281, 16956), (1413, 15372), (1647, 13188), (1708, 12717), (1884, 11529), (2196, 9891), (2198, 9882), (2268, 9577), (2562, 8478), (2826, 7686), (3294, 6594), (3297, 6588), (3843, 5652), (4239, 5124), (4396, 4941)]