21308980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:265

約数の個数: 96

約数和(自身を含む): 56754432

約数和(自身を除く): 35445452

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 101, 110, 137, 140, 154, 202, 220, 274, 308, 385, 404, 505, 548, 685, 707, 770, 959, 1010, 1111, 1370, 1414, 1507, 1540, 1918, 2020, 2222, 2740, 2828, 3014, 3535, 3836, 4444, 4795, 5555, 6028, 7070, 7535, 7777, 9590, 10549, 11110, 13837, 14140, 15070, 15554, 19180, 21098, 22220, 27674, 30140, 31108, 38885, 42196, 52745, 55348, 69185, 77770, 96859, 105490, 138370, 152207, 155540, 193718, 210980, 276740, 304414, 387436, 484295, 608828, 761035, 968590, 1065449, 1522070, 1937180, 2130898, 3044140, 4261796, 5327245, 10654490, 21308980]

約数ペア:

[(1, 21308980), (2, 10654490), (4, 5327245), (5, 4261796), (7, 3044140), (10, 2130898), (11, 1937180), (14, 1522070), (20, 1065449), (22, 968590), (28, 761035), (35, 608828), (44, 484295), (55, 387436), (70, 304414), (77, 276740), (101, 210980), (110, 193718), (137, 155540), (140, 152207), (154, 138370), (202, 105490), (220, 96859), (274, 77770), (308, 69185), (385, 55348), (404, 52745), (505, 42196), (548, 38885), (685, 31108), (707, 30140), (770, 27674), (959, 22220), (1010, 21098), (1111, 19180), (1370, 15554), (1414, 15070), (1507, 14140), (1540, 13837), (1918, 11110), (2020, 10549), (2222, 9590), (2740, 7777), (2828, 7535), (3014, 7070), (3535, 6028), (3836, 5555), (4444, 4795)]