20942649

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^2\times {\mathrm{281}}^1$

素因数の和:327

約数の個数: 54

約数和(自身を含む): 38240046

約数和(自身を除く): 17297397

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 169, 273, 281, 441, 507, 637, 819, 843, 1183, 1521, 1911, 1967, 2529, 3549, 3653, 5733, 5901, 8281, 10647, 10959, 13769, 17703, 24843, 25571, 32877, 41307, 47489, 74529, 76713, 123921, 142467, 178997, 230139, 332423, 427401, 536991, 997269, 1610973, 2326961, 2991807, 6980883, 20942649]

約数ペア:

[(1, 20942649), (3, 6980883), (7, 2991807), (9, 2326961), (13, 1610973), (21, 997269), (39, 536991), (49, 427401), (63, 332423), (91, 230139), (117, 178997), (147, 142467), (169, 123921), (273, 76713), (281, 74529), (441, 47489), (507, 41307), (637, 32877), (819, 25571), (843, 24843), (1183, 17703), (1521, 13769), (1911, 10959), (1967, 10647), (2529, 8281), (3549, 5901), (3653, 5733)]