42780520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:358

約数の個数: 64

約数和(自身を含む): 99435600

約数和(自身を除く): 56655080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 89, 122, 178, 197, 244, 305, 356, 394, 445, 488, 610, 712, 788, 890, 985, 1220, 1576, 1780, 1970, 2440, 3560, 3940, 5429, 7880, 10858, 12017, 17533, 21716, 24034, 27145, 35066, 43432, 48068, 54290, 60085, 70132, 87665, 96136, 108580, 120170, 140264, 175330, 217160, 240340, 350660, 480680, 701320, 1069513, 2139026, 4278052, 5347565, 8556104, 10695130, 21390260, 42780520]

約数ペア:

[(1, 42780520), (2, 21390260), (4, 10695130), (5, 8556104), (8, 5347565), (10, 4278052), (20, 2139026), (40, 1069513), (61, 701320), (89, 480680), (122, 350660), (178, 240340), (197, 217160), (244, 175330), (305, 140264), (356, 120170), (394, 108580), (445, 96136), (488, 87665), (610, 70132), (712, 60085), (788, 54290), (890, 48068), (985, 43432), (1220, 35066), (1576, 27145), (1780, 24034), (1970, 21716), (2440, 17533), (3560, 12017), (3940, 10858), (5429, 7880)]