20768580

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{311}}^1$

素因数の和:386

約数の個数: 144

約数和(自身を含む): 73592064

約数和(自身を除く): 52823484

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 53, 60, 63, 70, 84, 90, 105, 106, 126, 140, 159, 180, 210, 212, 252, 265, 311, 315, 318, 371, 420, 477, 530, 622, 630, 636, 742, 795, 933, 954, 1060, 1113, 1244, 1260, 1484, 1555, 1590, 1855, 1866, 1908, 2177, 2226, 2385, 2799, 3110, 3180, 3339, 3710, 3732, 4354, 4452, 4665, 4770, 5565, 5598, 6220, 6531, 6678, 7420, 8708, 9330, 9540, 10885, 11130, 11196, 13062, 13356, 13995, 16483, 16695, 18660, 19593, 21770, 22260, 26124, 27990, 32655, 32966, 33390, 39186, 43540, 49449, 55980, 65310, 65932, 66780, 78372, 82415, 97965, 98898, 115381, 130620, 148347, 164830, 195930, 197796, 230762, 247245, 296694, 329660, 346143, 391860, 461524, 494490, 576905, 593388, 692286, 741735, 988980, 1038429, 1153810, 1384572, 1483470, 1730715, 2076858, 2307620, 2966940, 3461430, 4153716, 5192145, 6922860, 10384290, 20768580]

約数ペア:

[(1, 20768580), (2, 10384290), (3, 6922860), (4, 5192145), (5, 4153716), (6, 3461430), (7, 2966940), (9, 2307620), (10, 2076858), (12, 1730715), (14, 1483470), (15, 1384572), (18, 1153810), (20, 1038429), (21, 988980), (28, 741735), (30, 692286), (35, 593388), (36, 576905), (42, 494490), (45, 461524), (53, 391860), (60, 346143), (63, 329660), (70, 296694), (84, 247245), (90, 230762), (105, 197796), (106, 195930), (126, 164830), (140, 148347), (159, 130620), (180, 115381), (210, 98898), (212, 97965), (252, 82415), (265, 78372), (311, 66780), (315, 65932), (318, 65310), (371, 55980), (420, 49449), (477, 43540), (530, 39186), (622, 33390), (630, 32966), (636, 32655), (742, 27990), (795, 26124), (933, 22260), (954, 21770), (1060, 19593), (1113, 18660), (1244, 16695), (1260, 16483), (1484, 13995), (1555, 13356), (1590, 13062), (1855, 11196), (1866, 11130), (1908, 10885), (2177, 9540), (2226, 9330), (2385, 8708), (2799, 7420), (3110, 6678), (3180, 6531), (3339, 6220), (3710, 5598), (3732, 5565), (4354, 4770), (4452, 4665)]