20708520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{277}}^1$

素因数の和:387

約数の個数: 128

約数和(自身を含む): 72057600

約数和(自身を除く): 51349080

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 89, 105, 120, 140, 168, 178, 210, 267, 277, 280, 356, 420, 445, 534, 554, 623, 712, 831, 840, 890, 1068, 1108, 1246, 1335, 1385, 1662, 1780, 1869, 1939, 2136, 2216, 2492, 2670, 2770, 3115, 3324, 3560, 3738, 3878, 4155, 4984, 5340, 5540, 5817, 6230, 6648, 7476, 7756, 8310, 9345, 9695, 10680, 11080, 11634, 12460, 14952, 15512, 16620, 18690, 19390, 23268, 24653, 24920, 29085, 33240, 37380, 38780, 46536, 49306, 58170, 73959, 74760, 77560, 98612, 116340, 123265, 147918, 172571, 197224, 232680, 246530, 295836, 345142, 369795, 493060, 517713, 591672, 690284, 739590, 862855, 986120, 1035426, 1380568, 1479180, 1725710, 2070852, 2588565, 2958360, 3451420, 4141704, 5177130, 6902840, 10354260, 20708520]

約数ペア:

[(1, 20708520), (2, 10354260), (3, 6902840), (4, 5177130), (5, 4141704), (6, 3451420), (7, 2958360), (8, 2588565), (10, 2070852), (12, 1725710), (14, 1479180), (15, 1380568), (20, 1035426), (21, 986120), (24, 862855), (28, 739590), (30, 690284), (35, 591672), (40, 517713), (42, 493060), (56, 369795), (60, 345142), (70, 295836), (84, 246530), (89, 232680), (105, 197224), (120, 172571), (140, 147918), (168, 123265), (178, 116340), (210, 98612), (267, 77560), (277, 74760), (280, 73959), (356, 58170), (420, 49306), (445, 46536), (534, 38780), (554, 37380), (623, 33240), (712, 29085), (831, 24920), (840, 24653), (890, 23268), (1068, 19390), (1108, 18690), (1246, 16620), (1335, 15512), (1385, 14952), (1662, 12460), (1780, 11634), (1869, 11080), (1939, 10680), (2136, 9695), (2216, 9345), (2492, 8310), (2670, 7756), (2770, 7476), (3115, 6648), (3324, 6230), (3560, 5817), (3738, 5540), (3878, 5340), (4155, 4984)]