21996720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:379

約数の個数: 120

約数和(自身を含む): 74745216

約数和(自身を除く): 52748496

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 137, 144, 180, 223, 240, 274, 360, 411, 446, 548, 669, 685, 720, 822, 892, 1096, 1115, 1233, 1338, 1370, 1644, 1784, 2007, 2055, 2192, 2230, 2466, 2676, 2740, 3288, 3345, 3568, 4014, 4110, 4460, 4932, 5352, 5480, 6165, 6576, 6690, 8028, 8220, 8920, 9864, 10035, 10704, 10960, 12330, 13380, 16056, 16440, 17840, 19728, 20070, 24660, 26760, 30551, 32112, 32880, 40140, 49320, 53520, 61102, 80280, 91653, 98640, 122204, 152755, 160560, 183306, 244408, 274959, 305510, 366612, 458265, 488816, 549918, 611020, 733224, 916530, 1099836, 1222040, 1374795, 1466448, 1833060, 2199672, 2444080, 2749590, 3666120, 4399344, 5499180, 7332240, 10998360, 21996720]

約数ペア:

[(1, 21996720), (2, 10998360), (3, 7332240), (4, 5499180), (5, 4399344), (6, 3666120), (8, 2749590), (9, 2444080), (10, 2199672), (12, 1833060), (15, 1466448), (16, 1374795), (18, 1222040), (20, 1099836), (24, 916530), (30, 733224), (36, 611020), (40, 549918), (45, 488816), (48, 458265), (60, 366612), (72, 305510), (80, 274959), (90, 244408), (120, 183306), (137, 160560), (144, 152755), (180, 122204), (223, 98640), (240, 91653), (274, 80280), (360, 61102), (411, 53520), (446, 49320), (548, 40140), (669, 32880), (685, 32112), (720, 30551), (822, 26760), (892, 24660), (1096, 20070), (1115, 19728), (1233, 17840), (1338, 16440), (1370, 16056), (1644, 13380), (1784, 12330), (2007, 10960), (2055, 10704), (2192, 10035), (2230, 9864), (2466, 8920), (2676, 8220), (2740, 8028), (3288, 6690), (3345, 6576), (3568, 6165), (4014, 5480), (4110, 5352), (4460, 4932)]