820121205

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 1380084480

約数和(自身を除く): 559963275

約数列:

[1, 3, 5, 15, 53, 67, 89, 159, 173, 201, 265, 267, 335, 445, 519, 795, 865, 1005, 1335, 2595, 3551, 4717, 5963, 9169, 10653, 11591, 14151, 15397, 17755, 17889, 23585, 27507, 29815, 34773, 45845, 46191, 53265, 57955, 70755, 76985, 89445, 137535, 173865, 230955, 316039, 614323, 816041, 948117, 1031599, 1580195, 1842969, 2448123, 3071615, 3094797, 4080205, 4740585, 5157995, 9214845, 12240615, 15473985, 54674747, 164024241, 273373735, 820121205]

約数ペア:

[(1, 820121205), (3, 273373735), (5, 164024241), (15, 54674747), (53, 15473985), (67, 12240615), (89, 9214845), (159, 5157995), (173, 4740585), (201, 4080205), (265, 3094797), (267, 3071615), (335, 2448123), (445, 1842969), (519, 1580195), (795, 1031599), (865, 948117), (1005, 816041), (1335, 614323), (2595, 316039), (3551, 230955), (4717, 173865), (5963, 137535), (9169, 89445), (10653, 76985), (11591, 70755), (14151, 57955), (15397, 53265), (17755, 46191), (17889, 45845), (23585, 34773), (27507, 29815)]