28887131

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{263}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 38320128

約数和(自身を除く): 9432997

約数列:

[1, 7, 13, 17, 71, 91, 119, 221, 263, 497, 923, 1207, 1547, 1841, 3419, 4471, 6461, 8449, 15691, 18673, 23933, 31297, 58123, 109837, 130711, 242749, 317441, 406861, 1699243, 2222087, 4126733, 28887131]

約数ペア:

[(1, 28887131), (7, 4126733), (13, 2222087), (17, 1699243), (71, 406861), (91, 317441), (119, 242749), (221, 130711), (263, 109837), (497, 58123), (923, 31297), (1207, 23933), (1547, 18673), (1841, 15691), (3419, 8449), (4471, 6461)]