21490812

素因数分解:

$2^2\times 3^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:189

約数の個数: 144

約数和(自身を含む): 67415040

約数和(自身を除く): 45924228

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 31, 36, 42, 49, 54, 62, 63, 84, 93, 98, 108, 124, 126, 131, 147, 186, 189, 196, 217, 252, 262, 279, 294, 372, 378, 393, 434, 441, 524, 558, 588, 651, 756, 786, 837, 868, 882, 917, 1116, 1179, 1302, 1323, 1519, 1572, 1674, 1764, 1834, 1953, 2358, 2604, 2646, 2751, 3038, 3348, 3537, 3668, 3906, 4061, 4557, 4716, 5292, 5502, 5859, 6076, 6419, 7074, 7812, 8122, 8253, 9114, 11004, 11718, 12183, 12838, 13671, 14148, 16244, 16506, 18228, 19257, 23436, 24366, 24759, 25676, 27342, 28427, 33012, 36549, 38514, 41013, 48732, 49518, 54684, 56854, 57771, 73098, 77028, 82026, 85281, 99036, 109647, 113708, 115542, 146196, 164052, 170562, 173313, 198989, 219294, 231084, 255843, 341124, 346626, 397978, 438588, 511686, 596967, 693252, 767529, 795956, 1023372, 1193934, 1535058, 1790901, 2387868, 3070116, 3581802, 5372703, 7163604, 10745406, 21490812]

約数ペア:

[(1, 21490812), (2, 10745406), (3, 7163604), (4, 5372703), (6, 3581802), (7, 3070116), (9, 2387868), (12, 1790901), (14, 1535058), (18, 1193934), (21, 1023372), (27, 795956), (28, 767529), (31, 693252), (36, 596967), (42, 511686), (49, 438588), (54, 397978), (62, 346626), (63, 341124), (84, 255843), (93, 231084), (98, 219294), (108, 198989), (124, 173313), (126, 170562), (131, 164052), (147, 146196), (186, 115542), (189, 113708), (196, 109647), (217, 99036), (252, 85281), (262, 82026), (279, 77028), (294, 73098), (372, 57771), (378, 56854), (393, 54684), (434, 49518), (441, 48732), (524, 41013), (558, 38514), (588, 36549), (651, 33012), (756, 28427), (786, 27342), (837, 25676), (868, 24759), (882, 24366), (917, 23436), (1116, 19257), (1179, 18228), (1302, 16506), (1323, 16244), (1519, 14148), (1572, 13671), (1674, 12838), (1764, 12183), (1834, 11718), (1953, 11004), (2358, 9114), (2604, 8253), (2646, 8122), (2751, 7812), (3038, 7074), (3348, 6419), (3537, 6076), (3668, 5859), (3906, 5502), (4061, 5292), (4557, 4716)]