21220980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:150

約数の個数: 144

約数和(自身を含む): 67925760

約数和(自身を除く): 46704780

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 37, 44, 55, 60, 66, 74, 79, 110, 111, 121, 132, 148, 158, 165, 185, 220, 222, 237, 242, 316, 330, 363, 370, 395, 407, 444, 474, 484, 555, 605, 660, 726, 740, 790, 814, 869, 948, 1110, 1185, 1210, 1221, 1452, 1580, 1628, 1738, 1815, 2035, 2220, 2370, 2420, 2442, 2607, 2923, 3476, 3630, 4070, 4345, 4477, 4740, 4884, 5214, 5846, 6105, 7260, 8140, 8690, 8769, 8954, 9559, 10428, 11692, 12210, 13035, 13431, 14615, 17380, 17538, 17908, 19118, 22385, 24420, 26070, 26862, 28677, 29230, 32153, 35076, 38236, 43845, 44770, 47795, 52140, 53724, 57354, 58460, 64306, 67155, 87690, 89540, 95590, 96459, 114708, 128612, 134310, 143385, 160765, 175380, 191180, 192918, 268620, 286770, 321530, 353683, 385836, 482295, 573540, 643060, 707366, 964590, 1061049, 1414732, 1768415, 1929180, 2122098, 3536830, 4244196, 5305245, 7073660, 10610490, 21220980]

約数ペア:

[(1, 21220980), (2, 10610490), (3, 7073660), (4, 5305245), (5, 4244196), (6, 3536830), (10, 2122098), (11, 1929180), (12, 1768415), (15, 1414732), (20, 1061049), (22, 964590), (30, 707366), (33, 643060), (37, 573540), (44, 482295), (55, 385836), (60, 353683), (66, 321530), (74, 286770), (79, 268620), (110, 192918), (111, 191180), (121, 175380), (132, 160765), (148, 143385), (158, 134310), (165, 128612), (185, 114708), (220, 96459), (222, 95590), (237, 89540), (242, 87690), (316, 67155), (330, 64306), (363, 58460), (370, 57354), (395, 53724), (407, 52140), (444, 47795), (474, 44770), (484, 43845), (555, 38236), (605, 35076), (660, 32153), (726, 29230), (740, 28677), (790, 26862), (814, 26070), (869, 24420), (948, 22385), (1110, 19118), (1185, 17908), (1210, 17538), (1221, 17380), (1452, 14615), (1580, 13431), (1628, 13035), (1738, 12210), (1815, 11692), (2035, 10428), (2220, 9559), (2370, 8954), (2420, 8769), (2442, 8690), (2607, 8140), (2923, 7260), (3476, 6105), (3630, 5846), (4070, 5214), (4345, 4884), (4477, 4740)]