19645904

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{20129}}^1$

素因数の和:20198

約数の個数: 20

約数和(自身を含む): 38689860

約数和(自身を除く): 19043956

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 20129, 40258, 80516, 161032, 322064, 1227869, 2455738, 4911476, 9822952, 19645904]

約数ペア:

[(1, 19645904), (2, 9822952), (4, 4911476), (8, 2455738), (16, 1227869), (61, 322064), (122, 161032), (244, 80516), (488, 40258), (976, 20129)]