21153704

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{41}}^2$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 48123390

約数和(自身を除く): 26969686

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 41, 44, 52, 82, 88, 104, 121, 143, 164, 242, 286, 328, 451, 484, 533, 572, 902, 968, 1066, 1144, 1573, 1681, 1804, 2132, 3146, 3362, 3608, 4264, 4961, 5863, 6292, 6724, 9922, 11726, 12584, 13448, 18491, 19844, 21853, 23452, 36982, 39688, 43706, 46904, 64493, 73964, 87412, 128986, 147928, 174824, 203401, 240383, 257972, 406802, 480766, 515944, 813604, 961532, 1627208, 1923064, 2644213, 5288426, 10576852, 21153704]

約数ペア:

[(1, 21153704), (2, 10576852), (4, 5288426), (8, 2644213), (11, 1923064), (13, 1627208), (22, 961532), (26, 813604), (41, 515944), (44, 480766), (52, 406802), (82, 257972), (88, 240383), (104, 203401), (121, 174824), (143, 147928), (164, 128986), (242, 87412), (286, 73964), (328, 64493), (451, 46904), (484, 43706), (533, 39688), (572, 36982), (902, 23452), (968, 21853), (1066, 19844), (1144, 18491), (1573, 13448), (1681, 12584), (1804, 11726), (2132, 9922), (3146, 6724), (3362, 6292), (3608, 5863), (4264, 4961)]