39991990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{367}}^1\times {\mathrm{641}}^1$

素因数の和:1032

約数の個数: 32

約数和(自身を含む): 76546944

約数和(自身を除く): 36554954

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 367, 641, 734, 1282, 1835, 3205, 3670, 6239, 6410, 10897, 12478, 21794, 31195, 54485, 62390, 108970, 235247, 470494, 1176235, 2352470, 3999199, 7998398, 19995995, 39991990]

約数ペア:

[(1, 39991990), (2, 19995995), (5, 7998398), (10, 3999199), (17, 2352470), (34, 1176235), (85, 470494), (170, 235247), (367, 108970), (641, 62390), (734, 54485), (1282, 31195), (1835, 21794), (3205, 12478), (3670, 10897), (6239, 6410)]