388520920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{241}}^1\times {\mathrm{983}}^1$

素因数の和:1276

約数の個数: 64

約数和(自身を含む): 900123840

約数和(自身を除く): 511602920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 241, 328, 410, 482, 820, 964, 983, 1205, 1640, 1928, 1966, 2410, 3932, 4820, 4915, 7864, 9640, 9830, 9881, 19660, 19762, 39320, 39524, 40303, 49405, 79048, 80606, 98810, 161212, 197620, 201515, 236903, 322424, 395240, 403030, 473806, 806060, 947612, 1184515, 1612120, 1895224, 2369030, 4738060, 9476120, 9713023, 19426046, 38852092, 48565115, 77704184, 97130230, 194260460, 388520920]

約数ペア:

[(1, 388520920), (2, 194260460), (4, 97130230), (5, 77704184), (8, 48565115), (10, 38852092), (20, 19426046), (40, 9713023), (41, 9476120), (82, 4738060), (164, 2369030), (205, 1895224), (241, 1612120), (328, 1184515), (410, 947612), (482, 806060), (820, 473806), (964, 403030), (983, 395240), (1205, 322424), (1640, 236903), (1928, 201515), (1966, 197620), (2410, 161212), (3932, 98810), (4820, 80606), (4915, 79048), (7864, 49405), (9640, 40303), (9830, 39524), (9881, 39320), (19660, 19762)]