21287714

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{419}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 38707200

約数和(自身を除く): 17419486

約数列:

[1, 2, 7, 14, 19, 38, 133, 191, 266, 382, 419, 838, 1337, 2674, 2933, 3629, 5866, 7258, 7961, 15922, 25403, 50806, 55727, 80029, 111454, 160058, 560203, 1120406, 1520551, 3041102, 10643857, 21287714]

約数ペア:

[(1, 21287714), (2, 10643857), (7, 3041102), (14, 1520551), (19, 1120406), (38, 560203), (133, 160058), (191, 111454), (266, 80029), (382, 55727), (419, 50806), (838, 25403), (1337, 15922), (2674, 7961), (2933, 7258), (3629, 5866)]