28687948

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{19867}}^1$

素因数の和:19909

約数の個数: 18

約数和(自身を含む): 52987956

約数和(自身を除く): 24300008

約数列:

[1, 2, 4, 19, 38, 76, 361, 722, 1444, 19867, 39734, 79468, 377473, 754946, 1509892, 7171987, 14343974, 28687948]

約数ペア:

[(1, 28687948), (2, 14343974), (4, 7171987), (19, 1509892), (38, 754946), (76, 377473), (361, 79468), (722, 39734), (1444, 19867)]