20739915

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1291}}^1$

素因数の和:1329

約数の個数: 64

約数和(自身を含む): 44651520

約数和(自身を除く): 23911605

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 85, 105, 119, 135, 153, 189, 255, 315, 357, 459, 595, 765, 945, 1071, 1291, 1785, 2295, 3213, 3873, 5355, 6455, 9037, 11619, 16065, 19365, 21947, 27111, 34857, 45185, 58095, 65841, 81333, 109735, 135555, 153629, 174285, 197523, 243999, 329205, 406665, 460887, 592569, 768145, 987615, 1219995, 1382661, 2304435, 2962845, 4147983, 6913305, 20739915]

約数ペア:

[(1, 20739915), (3, 6913305), (5, 4147983), (7, 2962845), (9, 2304435), (15, 1382661), (17, 1219995), (21, 987615), (27, 768145), (35, 592569), (45, 460887), (51, 406665), (63, 329205), (85, 243999), (105, 197523), (119, 174285), (135, 153629), (153, 135555), (189, 109735), (255, 81333), (315, 65841), (357, 58095), (459, 45185), (595, 34857), (765, 27111), (945, 21947), (1071, 19365), (1291, 16065), (1785, 11619), (2295, 9037), (3213, 6455), (3873, 5355)]