20571460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 33618620

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 89, 91, 127, 130, 140, 178, 182, 254, 260, 356, 364, 445, 455, 508, 623, 635, 889, 890, 910, 1157, 1246, 1270, 1651, 1778, 1780, 1820, 2314, 2492, 2540, 3115, 3302, 3556, 4445, 4628, 5785, 6230, 6604, 8099, 8255, 8890, 11303, 11557, 11570, 12460, 16198, 16510, 17780, 22606, 23114, 23140, 32396, 33020, 40495, 45212, 46228, 56515, 57785, 79121, 80990, 113030, 115570, 146939, 158242, 161980, 226060, 231140, 293878, 316484, 395605, 587756, 734695, 791210, 1028573, 1469390, 1582420, 2057146, 2938780, 4114292, 5142865, 10285730, 20571460]

約数ペア:

[(1, 20571460), (2, 10285730), (4, 5142865), (5, 4114292), (7, 2938780), (10, 2057146), (13, 1582420), (14, 1469390), (20, 1028573), (26, 791210), (28, 734695), (35, 587756), (52, 395605), (65, 316484), (70, 293878), (89, 231140), (91, 226060), (127, 161980), (130, 158242), (140, 146939), (178, 115570), (182, 113030), (254, 80990), (260, 79121), (356, 57785), (364, 56515), (445, 46228), (455, 45212), (508, 40495), (623, 33020), (635, 32396), (889, 23140), (890, 23114), (910, 22606), (1157, 17780), (1246, 16510), (1270, 16198), (1651, 12460), (1778, 11570), (1780, 11557), (1820, 11303), (2314, 8890), (2492, 8255), (2540, 8099), (3115, 6604), (3302, 6230), (3556, 5785), (4445, 4628)]