19979841

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{653}}^1$

素因数の和:741

約数の個数: 32

約数和(自身を含む): 32145408

約数和(自身を除く): 12165567

約数列:

[1, 3, 7, 21, 31, 47, 93, 141, 217, 329, 651, 653, 987, 1457, 1959, 4371, 4571, 10199, 13713, 20243, 30597, 30691, 60729, 92073, 141701, 214837, 425103, 644511, 951421, 2854263, 6659947, 19979841]

約数ペア:

[(1, 19979841), (3, 6659947), (7, 2854263), (21, 951421), (31, 644511), (47, 425103), (93, 214837), (141, 141701), (217, 92073), (329, 60729), (651, 30691), (653, 30597), (987, 20243), (1457, 13713), (1959, 10199), (4371, 4571)]