20840644

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 42477120

約数和(自身を除く): 21636476

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 97, 194, 209, 257, 388, 418, 514, 836, 1028, 1067, 1843, 2134, 2827, 3686, 4268, 4883, 5654, 7372, 9766, 11308, 19532, 20273, 24929, 40546, 49858, 53713, 81092, 99716, 107426, 214852, 274219, 473651, 548438, 947302, 1096876, 1894604, 5210161, 10420322, 20840644]

約数ペア:

[(1, 20840644), (2, 10420322), (4, 5210161), (11, 1894604), (19, 1096876), (22, 947302), (38, 548438), (44, 473651), (76, 274219), (97, 214852), (194, 107426), (209, 99716), (257, 81092), (388, 53713), (418, 49858), (514, 40546), (836, 24929), (1028, 20273), (1067, 19532), (1843, 11308), (2134, 9766), (2827, 7372), (3686, 5654), (4268, 4883)]