20455820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{359}}^1$

素因数の和:423

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 34701940

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 37, 44, 55, 70, 74, 77, 110, 140, 148, 154, 185, 220, 259, 308, 359, 370, 385, 407, 518, 718, 740, 770, 814, 1036, 1295, 1436, 1540, 1628, 1795, 2035, 2513, 2590, 2849, 3590, 3949, 4070, 5026, 5180, 5698, 7180, 7898, 8140, 10052, 11396, 12565, 13283, 14245, 15796, 19745, 25130, 26566, 27643, 28490, 39490, 50260, 53132, 55286, 56980, 66415, 78980, 92981, 110572, 132830, 138215, 146113, 185962, 265660, 276430, 292226, 371924, 464905, 552860, 584452, 730565, 929810, 1022791, 1461130, 1859620, 2045582, 2922260, 4091164, 5113955, 10227910, 20455820]

約数ペア:

[(1, 20455820), (2, 10227910), (4, 5113955), (5, 4091164), (7, 2922260), (10, 2045582), (11, 1859620), (14, 1461130), (20, 1022791), (22, 929810), (28, 730565), (35, 584452), (37, 552860), (44, 464905), (55, 371924), (70, 292226), (74, 276430), (77, 265660), (110, 185962), (140, 146113), (148, 138215), (154, 132830), (185, 110572), (220, 92981), (259, 78980), (308, 66415), (359, 56980), (370, 55286), (385, 53132), (407, 50260), (518, 39490), (718, 28490), (740, 27643), (770, 26566), (814, 25130), (1036, 19745), (1295, 15796), (1436, 14245), (1540, 13283), (1628, 12565), (1795, 11396), (2035, 10052), (2513, 8140), (2590, 7898), (2849, 7180), (3590, 5698), (3949, 5180), (4070, 5026)]