20175540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{397}}^1$

素因数の和:438

約数の個数: 144

約数和(自身を含む): 71143296

約数和(自身を除く): 50967756

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 55, 60, 66, 70, 77, 84, 105, 110, 121, 132, 140, 154, 165, 210, 220, 231, 242, 308, 330, 363, 385, 397, 420, 462, 484, 605, 660, 726, 770, 794, 847, 924, 1155, 1191, 1210, 1452, 1540, 1588, 1694, 1815, 1985, 2310, 2382, 2420, 2541, 2779, 3388, 3630, 3970, 4235, 4367, 4620, 4764, 5082, 5558, 5955, 7260, 7940, 8337, 8470, 8734, 10164, 11116, 11910, 12705, 13101, 13895, 16674, 16940, 17468, 21835, 23820, 25410, 26202, 27790, 30569, 33348, 41685, 43670, 48037, 50820, 52404, 55580, 61138, 65505, 83370, 87340, 91707, 96074, 122276, 131010, 144111, 152845, 166740, 183414, 192148, 240185, 262020, 288222, 305690, 336259, 366828, 458535, 480370, 576444, 611380, 672518, 720555, 917070, 960740, 1008777, 1345036, 1441110, 1681295, 1834140, 2017554, 2882220, 3362590, 4035108, 5043885, 6725180, 10087770, 20175540]

約数ペア:

[(1, 20175540), (2, 10087770), (3, 6725180), (4, 5043885), (5, 4035108), (6, 3362590), (7, 2882220), (10, 2017554), (11, 1834140), (12, 1681295), (14, 1441110), (15, 1345036), (20, 1008777), (21, 960740), (22, 917070), (28, 720555), (30, 672518), (33, 611380), (35, 576444), (42, 480370), (44, 458535), (55, 366828), (60, 336259), (66, 305690), (70, 288222), (77, 262020), (84, 240185), (105, 192148), (110, 183414), (121, 166740), (132, 152845), (140, 144111), (154, 131010), (165, 122276), (210, 96074), (220, 91707), (231, 87340), (242, 83370), (308, 65505), (330, 61138), (363, 55580), (385, 52404), (397, 50820), (420, 48037), (462, 43670), (484, 41685), (605, 33348), (660, 30569), (726, 27790), (770, 26202), (794, 25410), (847, 23820), (924, 21835), (1155, 17468), (1191, 16940), (1210, 16674), (1452, 13895), (1540, 13101), (1588, 12705), (1694, 11910), (1815, 11116), (1985, 10164), (2310, 8734), (2382, 8470), (2420, 8337), (2541, 7940), (2779, 7260), (3388, 5955), (3630, 5558), (3970, 5082), (4235, 4764), (4367, 4620)]