21809788

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{419}}^1$

素因数の和:467

約数の個数: 72

約数和(自身を含む): 51649920

約数和(自身を除く): 29840132

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 169, 182, 286, 308, 338, 364, 419, 572, 676, 838, 1001, 1183, 1676, 1859, 2002, 2366, 2933, 3718, 4004, 4609, 4732, 5447, 5866, 7436, 9218, 10894, 11732, 13013, 18436, 21788, 26026, 32263, 38129, 52052, 59917, 64526, 70811, 76258, 119834, 129052, 141622, 152516, 239668, 283244, 419419, 495677, 778921, 838838, 991354, 1557842, 1677676, 1982708, 3115684, 5452447, 10904894, 21809788]

約数ペア:

[(1, 21809788), (2, 10904894), (4, 5452447), (7, 3115684), (11, 1982708), (13, 1677676), (14, 1557842), (22, 991354), (26, 838838), (28, 778921), (44, 495677), (52, 419419), (77, 283244), (91, 239668), (143, 152516), (154, 141622), (169, 129052), (182, 119834), (286, 76258), (308, 70811), (338, 64526), (364, 59917), (419, 52052), (572, 38129), (676, 32263), (838, 26026), (1001, 21788), (1183, 18436), (1676, 13013), (1859, 11732), (2002, 10894), (2366, 9218), (2933, 7436), (3718, 5866), (4004, 5447), (4609, 4732)]