21318220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:263

約数の個数: 96

約数和(自身を含む): 56770560

約数和(自身を除く): 35452340

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 109, 110, 127, 140, 154, 218, 220, 254, 308, 385, 436, 508, 545, 635, 763, 770, 889, 1090, 1199, 1270, 1397, 1526, 1540, 1778, 2180, 2398, 2540, 2794, 3052, 3556, 3815, 4445, 4796, 5588, 5995, 6985, 7630, 8393, 8890, 9779, 11990, 13843, 13970, 15260, 16786, 17780, 19558, 23980, 27686, 27940, 33572, 39116, 41965, 48895, 55372, 69215, 83930, 96901, 97790, 138430, 152273, 167860, 193802, 195580, 276860, 304546, 387604, 484505, 609092, 761365, 969010, 1065911, 1522730, 1938020, 2131822, 3045460, 4263644, 5329555, 10659110, 21318220]

約数ペア:

[(1, 21318220), (2, 10659110), (4, 5329555), (5, 4263644), (7, 3045460), (10, 2131822), (11, 1938020), (14, 1522730), (20, 1065911), (22, 969010), (28, 761365), (35, 609092), (44, 484505), (55, 387604), (70, 304546), (77, 276860), (109, 195580), (110, 193802), (127, 167860), (140, 152273), (154, 138430), (218, 97790), (220, 96901), (254, 83930), (308, 69215), (385, 55372), (436, 48895), (508, 41965), (545, 39116), (635, 33572), (763, 27940), (770, 27686), (889, 23980), (1090, 19558), (1199, 17780), (1270, 16786), (1397, 15260), (1526, 13970), (1540, 13843), (1778, 11990), (2180, 9779), (2398, 8890), (2540, 8393), (2794, 7630), (3052, 6985), (3556, 5995), (3815, 5588), (4445, 4796)]