21520378

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{379}}^1$

素因数の和:510

約数の個数: 32

約数和(自身を含む): 36936000

約数和(自身を除く): 15415622

約数列:

[1, 2, 11, 22, 29, 58, 89, 178, 319, 379, 638, 758, 979, 1958, 2581, 4169, 5162, 8338, 10991, 21982, 28391, 33731, 56782, 67462, 120901, 241802, 371041, 742082, 978199, 1956398, 10760189, 21520378]

約数ペア:

[(1, 21520378), (2, 10760189), (11, 1956398), (22, 978199), (29, 742082), (58, 371041), (89, 241802), (178, 120901), (319, 67462), (379, 56782), (638, 33731), (758, 28391), (979, 21982), (1958, 10991), (2581, 8338), (4169, 5162)]