21728278

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:193

約数の個数: 64

約数和(自身を含む): 41912640

約数和(自身を除く): 20184362

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 41, 82, 109, 143, 187, 218, 221, 286, 374, 442, 451, 533, 697, 902, 1066, 1199, 1394, 1417, 1853, 2398, 2431, 2834, 3706, 4469, 4862, 5863, 7667, 8938, 9061, 11726, 15334, 15587, 18122, 20383, 24089, 31174, 40766, 48178, 49159, 58097, 75973, 98318, 99671, 116194, 151946, 199342, 264979, 529958, 639067, 835703, 987649, 1278134, 1671406, 1975298, 10864139, 21728278]

約数ペア:

[(1, 21728278), (2, 10864139), (11, 1975298), (13, 1671406), (17, 1278134), (22, 987649), (26, 835703), (34, 639067), (41, 529958), (82, 264979), (109, 199342), (143, 151946), (187, 116194), (218, 99671), (221, 98318), (286, 75973), (374, 58097), (442, 49159), (451, 48178), (533, 40766), (697, 31174), (902, 24089), (1066, 20383), (1199, 18122), (1394, 15587), (1417, 15334), (1853, 11726), (2398, 9061), (2431, 8938), (2834, 7667), (3706, 5863), (4469, 4862)]