399945208

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{72559}}^1$

素因数の和:72631

約数の個数: 32

約数和(自身を含む): 822830400

約数和(自身を除く): 422885192

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 5512, 72559, 145118, 290236, 580472, 943267, 1886534, 3773068, 3845627, 7546136, 7691254, 15382508, 30765016, 49993151, 99986302, 199972604, 399945208]

約数ペア:

[(1, 399945208), (2, 199972604), (4, 99986302), (8, 49993151), (13, 30765016), (26, 15382508), (52, 7691254), (53, 7546136), (104, 3845627), (106, 3773068), (212, 1886534), (424, 943267), (689, 580472), (1378, 290236), (2756, 145118), (5512, 72559)]