256292720

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{1811}}^1$

素因数の和:1914

約数の個数: 80

約数和(自身を含む): 626879520

約数和(自身を除く): 370586800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 61, 80, 116, 122, 145, 232, 244, 290, 305, 464, 488, 580, 610, 976, 1160, 1220, 1769, 1811, 2320, 2440, 3538, 3622, 4880, 7076, 7244, 8845, 9055, 14152, 14488, 17690, 18110, 28304, 28976, 35380, 36220, 52519, 70760, 72440, 105038, 110471, 141520, 144880, 210076, 220942, 262595, 420152, 441884, 525190, 552355, 840304, 883768, 1050380, 1104710, 1767536, 2100760, 2209420, 3203659, 4201520, 4418840, 6407318, 8837680, 12814636, 16018295, 25629272, 32036590, 51258544, 64073180, 128146360, 256292720]

約数ペア:

[(1, 256292720), (2, 128146360), (4, 64073180), (5, 51258544), (8, 32036590), (10, 25629272), (16, 16018295), (20, 12814636), (29, 8837680), (40, 6407318), (58, 4418840), (61, 4201520), (80, 3203659), (116, 2209420), (122, 2100760), (145, 1767536), (232, 1104710), (244, 1050380), (290, 883768), (305, 840304), (464, 552355), (488, 525190), (580, 441884), (610, 420152), (976, 262595), (1160, 220942), (1220, 210076), (1769, 144880), (1811, 141520), (2320, 110471), (2440, 105038), (3538, 72440), (3622, 70760), (4880, 52519), (7076, 36220), (7244, 35380), (8845, 28976), (9055, 28304), (14152, 18110), (14488, 17690)]