20005072

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:371

約数の個数: 40

約数和(自身を含む): 39977600

約数和(自身を除く): 19972528

約数列:

[1, 2, 4, 8, 16, 61, 103, 122, 199, 206, 244, 398, 412, 488, 796, 824, 976, 1592, 1648, 3184, 6283, 12139, 12566, 20497, 24278, 25132, 40994, 48556, 50264, 81988, 97112, 100528, 163976, 194224, 327952, 1250317, 2500634, 5001268, 10002536, 20005072]

約数ペア:

[(1, 20005072), (2, 10002536), (4, 5001268), (8, 2500634), (16, 1250317), (61, 327952), (103, 194224), (122, 163976), (199, 100528), (206, 97112), (244, 81988), (398, 50264), (412, 48556), (488, 40994), (796, 25132), (824, 24278), (976, 20497), (1592, 12566), (1648, 12139), (3184, 6283)]