19978842

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 96

約数和(自身を含む): 49014720

約数和(自身を除く): 29035878

約数列:

[1, 2, 3, 6, 13, 17, 19, 26, 34, 38, 39, 51, 57, 61, 78, 102, 114, 122, 169, 183, 221, 247, 323, 338, 366, 442, 494, 507, 646, 663, 741, 793, 969, 1014, 1037, 1159, 1326, 1482, 1586, 1938, 2074, 2318, 2379, 2873, 3111, 3211, 3477, 4199, 4758, 5746, 6222, 6422, 6954, 8398, 8619, 9633, 10309, 12597, 13481, 15067, 17238, 19266, 19703, 20618, 25194, 26962, 30134, 30927, 39406, 40443, 45201, 54587, 59109, 61854, 80886, 90402, 109174, 118218, 163761, 175253, 195871, 256139, 327522, 350506, 391742, 512278, 525759, 587613, 768417, 1051518, 1175226, 1536834, 3329807, 6659614, 9989421, 19978842]

約数ペア:

[(1, 19978842), (2, 9989421), (3, 6659614), (6, 3329807), (13, 1536834), (17, 1175226), (19, 1051518), (26, 768417), (34, 587613), (38, 525759), (39, 512278), (51, 391742), (57, 350506), (61, 327522), (78, 256139), (102, 195871), (114, 175253), (122, 163761), (169, 118218), (183, 109174), (221, 90402), (247, 80886), (323, 61854), (338, 59109), (366, 54587), (442, 45201), (494, 40443), (507, 39406), (646, 30927), (663, 30134), (741, 26962), (793, 25194), (969, 20618), (1014, 19703), (1037, 19266), (1159, 17238), (1326, 15067), (1482, 13481), (1586, 12597), (1938, 10309), (2074, 9633), (2318, 8619), (2379, 8398), (2873, 6954), (3111, 6422), (3211, 6222), (3477, 5746), (4199, 4758)]