21685378

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:211

約数の個数: 48

約数和(自身を含む): 39481848

約数和(自身を除く): 17796470

約数列:

[1, 2, 11, 13, 22, 26, 61, 113, 121, 122, 143, 226, 242, 286, 671, 793, 1243, 1342, 1469, 1573, 1586, 2486, 2938, 3146, 6893, 7381, 8723, 13673, 13786, 14762, 16159, 17446, 27346, 32318, 75823, 89609, 95953, 151646, 177749, 179218, 191906, 355498, 834053, 985699, 1668106, 1971398, 10842689, 21685378]

約数ペア:

[(1, 21685378), (2, 10842689), (11, 1971398), (13, 1668106), (22, 985699), (26, 834053), (61, 355498), (113, 191906), (121, 179218), (122, 177749), (143, 151646), (226, 95953), (242, 89609), (286, 75823), (671, 32318), (793, 27346), (1243, 17446), (1342, 16159), (1469, 14762), (1573, 13786), (1586, 13673), (2486, 8723), (2938, 7381), (3146, 6893)]