21554960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{631}}^1$

素因数の和:712

約数の個数: 80

約数和(自身を含む): 58305792

約数和(自身を除く): 36750832

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 610, 631, 854, 976, 1220, 1262, 1708, 2135, 2440, 2524, 3155, 3416, 4270, 4417, 4880, 5048, 6310, 6832, 8540, 8834, 10096, 12620, 17080, 17668, 22085, 25240, 34160, 35336, 38491, 44170, 50480, 70672, 76982, 88340, 153964, 176680, 192455, 269437, 307928, 353360, 384910, 538874, 615856, 769820, 1077748, 1347185, 1539640, 2155496, 2694370, 3079280, 4310992, 5388740, 10777480, 21554960]

約数ペア:

[(1, 21554960), (2, 10777480), (4, 5388740), (5, 4310992), (7, 3079280), (8, 2694370), (10, 2155496), (14, 1539640), (16, 1347185), (20, 1077748), (28, 769820), (35, 615856), (40, 538874), (56, 384910), (61, 353360), (70, 307928), (80, 269437), (112, 192455), (122, 176680), (140, 153964), (244, 88340), (280, 76982), (305, 70672), (427, 50480), (488, 44170), (560, 38491), (610, 35336), (631, 34160), (854, 25240), (976, 22085), (1220, 17668), (1262, 17080), (1708, 12620), (2135, 10096), (2440, 8834), (2524, 8540), (3155, 6832), (3416, 6310), (4270, 5048), (4417, 4880)]