21138492720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{179383}}^1$

素因数の和:179890

約数の個数: 80

約数和(自身を含む): 65663154432

約数和(自身を除く): 44524661712

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 491, 982, 1473, 1964, 2455, 2946, 3928, 4910, 5892, 7365, 7856, 9820, 11784, 14730, 19640, 23568, 29460, 39280, 58920, 117840, 179383, 358766, 538149, 717532, 896915, 1076298, 1435064, 1793830, 2152596, 2690745, 2870128, 3587660, 4305192, 5381490, 7175320, 8610384, 10762980, 14350640, 21525960, 43051920, 88077053, 176154106, 264231159, 352308212, 440385265, 528462318, 704616424, 880770530, 1056924636, 1321155795, 1409232848, 1761541060, 2113849272, 2642311590, 3523082120, 4227698544, 5284623180, 7046164240, 10569246360, 21138492720]

約数ペア:

[(1, 21138492720), (2, 10569246360), (3, 7046164240), (4, 5284623180), (5, 4227698544), (6, 3523082120), (8, 2642311590), (10, 2113849272), (12, 1761541060), (15, 1409232848), (16, 1321155795), (20, 1056924636), (24, 880770530), (30, 704616424), (40, 528462318), (48, 440385265), (60, 352308212), (80, 264231159), (120, 176154106), (240, 88077053), (491, 43051920), (982, 21525960), (1473, 14350640), (1964, 10762980), (2455, 8610384), (2946, 7175320), (3928, 5381490), (4910, 4305192), (5892, 3587660), (7365, 2870128), (7856, 2690745), (9820, 2152596), (11784, 1793830), (14730, 1435064), (19640, 1076298), (23568, 896915), (29460, 717532), (39280, 538149), (58920, 358766), (117840, 179383)]