21987028

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1117}}^1$

素因数の和:1184

約数の個数: 48

約数和(自身を含む): 47582080

約数和(自身を除く): 25595052

約数列:

[1, 2, 4, 7, 14, 19, 28, 37, 38, 74, 76, 133, 148, 259, 266, 518, 532, 703, 1036, 1117, 1406, 2234, 2812, 4468, 4921, 7819, 9842, 15638, 19684, 21223, 31276, 41329, 42446, 82658, 84892, 148561, 165316, 289303, 297122, 578606, 594244, 785251, 1157212, 1570502, 3141004, 5496757, 10993514, 21987028]

約数ペア:

[(1, 21987028), (2, 10993514), (4, 5496757), (7, 3141004), (14, 1570502), (19, 1157212), (28, 785251), (37, 594244), (38, 578606), (74, 297122), (76, 289303), (133, 165316), (148, 148561), (259, 84892), (266, 82658), (518, 42446), (532, 41329), (703, 31276), (1036, 21223), (1117, 19684), (1406, 15638), (2234, 9842), (2812, 7819), (4468, 4921)]