20187635720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{256579}}^1$

素因数の和:256878

約数の個数: 64

約数和(自身を含む): 52096003200

約数和(自身を除く): 31908367480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 281, 562, 1124, 1405, 1967, 2248, 2810, 3934, 5620, 7868, 9835, 11240, 15736, 19670, 39340, 78680, 256579, 513158, 1026316, 1282895, 1796053, 2052632, 2565790, 3592106, 5131580, 7184212, 8980265, 10263160, 14368424, 17960530, 35921060, 71842120, 72098699, 144197398, 288394796, 360493495, 504690893, 576789592, 720986990, 1009381786, 1441973980, 2018763572, 2523454465, 2883947960, 4037527144, 5046908930, 10093817860, 20187635720]

約数ペア:

[(1, 20187635720), (2, 10093817860), (4, 5046908930), (5, 4037527144), (7, 2883947960), (8, 2523454465), (10, 2018763572), (14, 1441973980), (20, 1009381786), (28, 720986990), (35, 576789592), (40, 504690893), (56, 360493495), (70, 288394796), (140, 144197398), (280, 72098699), (281, 71842120), (562, 35921060), (1124, 17960530), (1405, 14368424), (1967, 10263160), (2248, 8980265), (2810, 7184212), (3934, 5131580), (5620, 3592106), (7868, 2565790), (9835, 2052632), (11240, 1796053), (15736, 1282895), (19670, 1026316), (39340, 513158), (78680, 256579)]