20945040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{443}}^1$

素因数の和:656

約数の個数: 80

約数和(自身を含む): 65406528

約数和(自身を除く): 44461488

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 197, 240, 394, 443, 591, 788, 886, 985, 1182, 1329, 1576, 1772, 1970, 2215, 2364, 2658, 2955, 3152, 3544, 3940, 4430, 4728, 5316, 5910, 6645, 7088, 7880, 8860, 9456, 10632, 11820, 13290, 15760, 17720, 21264, 23640, 26580, 35440, 47280, 53160, 87271, 106320, 174542, 261813, 349084, 436355, 523626, 698168, 872710, 1047252, 1309065, 1396336, 1745420, 2094504, 2618130, 3490840, 4189008, 5236260, 6981680, 10472520, 20945040]

約数ペア:

[(1, 20945040), (2, 10472520), (3, 6981680), (4, 5236260), (5, 4189008), (6, 3490840), (8, 2618130), (10, 2094504), (12, 1745420), (15, 1396336), (16, 1309065), (20, 1047252), (24, 872710), (30, 698168), (40, 523626), (48, 436355), (60, 349084), (80, 261813), (120, 174542), (197, 106320), (240, 87271), (394, 53160), (443, 47280), (591, 35440), (788, 26580), (886, 23640), (985, 21264), (1182, 17720), (1329, 15760), (1576, 13290), (1772, 11820), (1970, 10632), (2215, 9456), (2364, 8860), (2658, 7880), (2955, 7088), (3152, 6645), (3544, 5910), (3940, 5316), (4430, 4728)]