21270340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:102

約数の個数: 144

約数和(自身を含む): 59028480

約数和(自身を除く): 37758140

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 29, 31, 35, 52, 58, 62, 65, 70, 91, 116, 124, 130, 140, 145, 155, 169, 182, 203, 217, 260, 290, 310, 338, 364, 377, 403, 406, 434, 455, 580, 620, 676, 754, 806, 812, 845, 868, 899, 910, 1015, 1085, 1183, 1508, 1612, 1690, 1798, 1820, 1885, 2015, 2030, 2170, 2366, 2639, 2821, 3380, 3596, 3770, 4030, 4060, 4340, 4495, 4732, 4901, 5239, 5278, 5642, 5915, 6293, 7540, 8060, 8990, 9802, 10478, 10556, 11284, 11687, 11830, 12586, 13195, 14105, 17980, 19604, 20956, 23374, 23660, 24505, 25172, 26195, 26390, 28210, 31465, 34307, 36673, 46748, 49010, 52390, 52780, 56420, 58435, 62930, 68614, 73346, 81809, 98020, 104780, 116870, 125860, 137228, 146692, 151931, 163618, 171535, 183365, 233740, 303862, 327236, 343070, 366730, 409045, 607724, 686140, 733460, 759655, 818090, 1063517, 1519310, 1636180, 2127034, 3038620, 4254068, 5317585, 10635170, 21270340]

約数ペア:

[(1, 21270340), (2, 10635170), (4, 5317585), (5, 4254068), (7, 3038620), (10, 2127034), (13, 1636180), (14, 1519310), (20, 1063517), (26, 818090), (28, 759655), (29, 733460), (31, 686140), (35, 607724), (52, 409045), (58, 366730), (62, 343070), (65, 327236), (70, 303862), (91, 233740), (116, 183365), (124, 171535), (130, 163618), (140, 151931), (145, 146692), (155, 137228), (169, 125860), (182, 116870), (203, 104780), (217, 98020), (260, 81809), (290, 73346), (310, 68614), (338, 62930), (364, 58435), (377, 56420), (403, 52780), (406, 52390), (434, 49010), (455, 46748), (580, 36673), (620, 34307), (676, 31465), (754, 28210), (806, 26390), (812, 26195), (845, 25172), (868, 24505), (899, 23660), (910, 23374), (1015, 20956), (1085, 19604), (1183, 17980), (1508, 14105), (1612, 13195), (1690, 12586), (1798, 11830), (1820, 11687), (1885, 11284), (2015, 10556), (2030, 10478), (2170, 9802), (2366, 8990), (2639, 8060), (2821, 7540), (3380, 6293), (3596, 5915), (3770, 5642), (4030, 5278), (4060, 5239), (4340, 4901), (4495, 4732)]