20455440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{2939}}^1$

素因数の和:2984

約数の個数: 80

約数和(自身を含む): 65620800

約数和(自身を除く): 45165360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 29, 30, 40, 48, 58, 60, 80, 87, 116, 120, 145, 174, 232, 240, 290, 348, 435, 464, 580, 696, 870, 1160, 1392, 1740, 2320, 2939, 3480, 5878, 6960, 8817, 11756, 14695, 17634, 23512, 29390, 35268, 44085, 47024, 58780, 70536, 85231, 88170, 117560, 141072, 170462, 176340, 235120, 255693, 340924, 352680, 426155, 511386, 681848, 705360, 852310, 1022772, 1278465, 1363696, 1704620, 2045544, 2556930, 3409240, 4091088, 5113860, 6818480, 10227720, 20455440]

約数ペア:

[(1, 20455440), (2, 10227720), (3, 6818480), (4, 5113860), (5, 4091088), (6, 3409240), (8, 2556930), (10, 2045544), (12, 1704620), (15, 1363696), (16, 1278465), (20, 1022772), (24, 852310), (29, 705360), (30, 681848), (40, 511386), (48, 426155), (58, 352680), (60, 340924), (80, 255693), (87, 235120), (116, 176340), (120, 170462), (145, 141072), (174, 117560), (232, 88170), (240, 85231), (290, 70536), (348, 58780), (435, 47024), (464, 44085), (580, 35268), (696, 29390), (870, 23512), (1160, 17634), (1392, 14695), (1740, 11756), (2320, 8817), (2939, 6960), (3480, 5878)]