20999701976

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{53}}^2\times {\mathrm{7723}}^1$

素因数の和:7857

約数の個数: 72

約数和(自身を含む): 44117054940

約数和(自身を除く): 23117352964

約数列:

[1, 2, 4, 8, 11, 22, 44, 53, 88, 106, 121, 212, 242, 424, 484, 583, 968, 1166, 2332, 2809, 4664, 5618, 6413, 7723, 11236, 12826, 15446, 22472, 25652, 30892, 30899, 51304, 61784, 61798, 84953, 123596, 169906, 247192, 339812, 339889, 409319, 679624, 679778, 818638, 934483, 1359556, 1637276, 1868966, 2719112, 3274552, 3737932, 4502509, 7475864, 9005018, 18010036, 21693907, 36020072, 43387814, 49527599, 86775628, 99055198, 173551256, 198110396, 238632977, 396220792, 477265954, 954531908, 1909063816, 2624962747, 5249925494, 10499850988, 20999701976]

約数ペア:

[(1, 20999701976), (2, 10499850988), (4, 5249925494), (8, 2624962747), (11, 1909063816), (22, 954531908), (44, 477265954), (53, 396220792), (88, 238632977), (106, 198110396), (121, 173551256), (212, 99055198), (242, 86775628), (424, 49527599), (484, 43387814), (583, 36020072), (968, 21693907), (1166, 18010036), (2332, 9005018), (2809, 7475864), (4664, 4502509), (5618, 3737932), (6413, 3274552), (7723, 2719112), (11236, 1868966), (12826, 1637276), (15446, 1359556), (22472, 934483), (25652, 818638), (30892, 679778), (30899, 679624), (51304, 409319), (61784, 339889), (61798, 339812), (84953, 247192), (123596, 169906)]