21855568

素因数分解:

$2^4\times 7^2\times {\mathrm{61}}^1\times {\mathrm{457}}^1$

素因数の和:540

約数の個数: 60

約数和(自身を含む): 50175732

約数和(自身を除く): 28320164

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 61, 98, 112, 122, 196, 244, 392, 427, 457, 488, 784, 854, 914, 976, 1708, 1828, 2989, 3199, 3416, 3656, 5978, 6398, 6832, 7312, 11956, 12796, 22393, 23912, 25592, 27877, 44786, 47824, 51184, 55754, 89572, 111508, 179144, 195139, 223016, 358288, 390278, 446032, 780556, 1365973, 1561112, 2731946, 3122224, 5463892, 10927784, 21855568]

約数ペア:

[(1, 21855568), (2, 10927784), (4, 5463892), (7, 3122224), (8, 2731946), (14, 1561112), (16, 1365973), (28, 780556), (49, 446032), (56, 390278), (61, 358288), (98, 223016), (112, 195139), (122, 179144), (196, 111508), (244, 89572), (392, 55754), (427, 51184), (457, 47824), (488, 44786), (784, 27877), (854, 25592), (914, 23912), (976, 22393), (1708, 12796), (1828, 11956), (2989, 7312), (3199, 6832), (3416, 6398), (3656, 5978)]