21395850

素因数分解:

$2^1\times 3^1\times 5^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:141

約数の個数: 144

約数和(自身を含む): 64120896

約数和(自身を除く): 42725046

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 41, 42, 49, 50, 70, 71, 75, 82, 98, 105, 123, 142, 147, 150, 175, 205, 210, 213, 245, 246, 287, 294, 350, 355, 410, 426, 490, 497, 525, 574, 615, 710, 735, 861, 994, 1025, 1050, 1065, 1225, 1230, 1435, 1470, 1491, 1722, 1775, 2009, 2050, 2130, 2450, 2485, 2870, 2911, 2982, 3075, 3479, 3550, 3675, 4018, 4305, 4970, 5325, 5822, 6027, 6150, 6958, 7175, 7350, 7455, 8610, 8733, 10045, 10437, 10650, 12054, 12425, 14350, 14555, 14910, 17395, 17466, 20090, 20377, 20874, 21525, 24850, 29110, 30135, 34790, 37275, 40754, 43050, 43665, 50225, 52185, 60270, 61131, 72775, 74550, 86975, 87330, 100450, 101885, 104370, 122262, 142639, 145550, 150675, 173950, 203770, 218325, 260925, 285278, 301350, 305655, 427917, 436650, 509425, 521850, 611310, 713195, 855834, 1018850, 1426390, 1528275, 2139585, 3056550, 3565975, 4279170, 7131950, 10697925, 21395850]

約数ペア:

[(1, 21395850), (2, 10697925), (3, 7131950), (5, 4279170), (6, 3565975), (7, 3056550), (10, 2139585), (14, 1528275), (15, 1426390), (21, 1018850), (25, 855834), (30, 713195), (35, 611310), (41, 521850), (42, 509425), (49, 436650), (50, 427917), (70, 305655), (71, 301350), (75, 285278), (82, 260925), (98, 218325), (105, 203770), (123, 173950), (142, 150675), (147, 145550), (150, 142639), (175, 122262), (205, 104370), (210, 101885), (213, 100450), (245, 87330), (246, 86975), (287, 74550), (294, 72775), (350, 61131), (355, 60270), (410, 52185), (426, 50225), (490, 43665), (497, 43050), (525, 40754), (574, 37275), (615, 34790), (710, 30135), (735, 29110), (861, 24850), (994, 21525), (1025, 20874), (1050, 20377), (1065, 20090), (1225, 17466), (1230, 17395), (1435, 14910), (1470, 14555), (1491, 14350), (1722, 12425), (1775, 12054), (2009, 10650), (2050, 10437), (2130, 10045), (2450, 8733), (2485, 8610), (2870, 7455), (2911, 7350), (2982, 7175), (3075, 6958), (3479, 6150), (3550, 6027), (3675, 5822), (4018, 5325), (4305, 4970)]