21147308

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 72

約数和(自身を含む): 47345760

約数和(自身を除く): 26198452

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 41, 52, 82, 91, 109, 164, 169, 182, 218, 287, 338, 364, 436, 533, 574, 676, 763, 1066, 1148, 1183, 1417, 1526, 2132, 2366, 2834, 3052, 3731, 4469, 4732, 5668, 6929, 7462, 8938, 9919, 13858, 14924, 17876, 18421, 19838, 27716, 31283, 36842, 39676, 48503, 58097, 62566, 73684, 97006, 116194, 125132, 128947, 194012, 232388, 257894, 406679, 515788, 755261, 813358, 1510522, 1626716, 3021044, 5286827, 10573654, 21147308]

約数ペア:

[(1, 21147308), (2, 10573654), (4, 5286827), (7, 3021044), (13, 1626716), (14, 1510522), (26, 813358), (28, 755261), (41, 515788), (52, 406679), (82, 257894), (91, 232388), (109, 194012), (164, 128947), (169, 125132), (182, 116194), (218, 97006), (287, 73684), (338, 62566), (364, 58097), (436, 48503), (533, 39676), (574, 36842), (676, 31283), (763, 27716), (1066, 19838), (1148, 18421), (1183, 17876), (1417, 14924), (1526, 13858), (2132, 9919), (2366, 8938), (2834, 7462), (3052, 6929), (3731, 5668), (4469, 4732)]