21307860

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{1879}}^1$

素因数の和:1907

約数の個数: 120

約数和(自身を含む): 76433280

約数和(自身を除く): 55125420

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1879, 1890, 2268, 2835, 3758, 3780, 5637, 5670, 7516, 9395, 11274, 11340, 13153, 16911, 18790, 22548, 26306, 28185, 33822, 37580, 39459, 50733, 52612, 56370, 65765, 67644, 78918, 84555, 101466, 112740, 118377, 131530, 152199, 157836, 169110, 197295, 202932, 236754, 253665, 263060, 304398, 338220, 355131, 394590, 473508, 507330, 591885, 608796, 710262, 760995, 789180, 1014660, 1065393, 1183770, 1420524, 1521990, 1775655, 2130786, 2367540, 3043980, 3551310, 4261572, 5326965, 7102620, 10653930, 21307860]

約数ペア:

[(1, 21307860), (2, 10653930), (3, 7102620), (4, 5326965), (5, 4261572), (6, 3551310), (7, 3043980), (9, 2367540), (10, 2130786), (12, 1775655), (14, 1521990), (15, 1420524), (18, 1183770), (20, 1065393), (21, 1014660), (27, 789180), (28, 760995), (30, 710262), (35, 608796), (36, 591885), (42, 507330), (45, 473508), (54, 394590), (60, 355131), (63, 338220), (70, 304398), (81, 263060), (84, 253665), (90, 236754), (105, 202932), (108, 197295), (126, 169110), (135, 157836), (140, 152199), (162, 131530), (180, 118377), (189, 112740), (210, 101466), (252, 84555), (270, 78918), (315, 67644), (324, 65765), (378, 56370), (405, 52612), (420, 50733), (540, 39459), (567, 37580), (630, 33822), (756, 28185), (810, 26306), (945, 22548), (1134, 18790), (1260, 16911), (1620, 13153), (1879, 11340), (1890, 11274), (2268, 9395), (2835, 7516), (3758, 5670), (3780, 5637)]