21507904

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:383

約数の個数: 56

約数和(自身を含む): 47109888

約数和(自身を除く): 25601984

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 64, 88, 137, 176, 223, 274, 352, 446, 548, 704, 892, 1096, 1507, 1784, 2192, 2453, 3014, 3568, 4384, 4906, 6028, 7136, 8768, 9812, 12056, 14272, 19624, 24112, 30551, 39248, 48224, 61102, 78496, 96448, 122204, 156992, 244408, 336061, 488816, 672122, 977632, 1344244, 1955264, 2688488, 5376976, 10753952, 21507904]

約数ペア:

[(1, 21507904), (2, 10753952), (4, 5376976), (8, 2688488), (11, 1955264), (16, 1344244), (22, 977632), (32, 672122), (44, 488816), (64, 336061), (88, 244408), (137, 156992), (176, 122204), (223, 96448), (274, 78496), (352, 61102), (446, 48224), (548, 39248), (704, 30551), (892, 24112), (1096, 19624), (1507, 14272), (1784, 12056), (2192, 9812), (2453, 8768), (3014, 7136), (3568, 6028), (4384, 4906)]