20990536

素因数分解:

$2^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{379}}^1$

素因数の和:458

約数の個数: 64

約数和(自身を含む): 48153600

約数和(自身を除く): 27163064

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 43, 46, 56, 86, 92, 161, 172, 184, 301, 322, 344, 379, 602, 644, 758, 989, 1204, 1288, 1516, 1978, 2408, 2653, 3032, 3956, 5306, 6923, 7912, 8717, 10612, 13846, 16297, 17434, 21224, 27692, 32594, 34868, 55384, 61019, 65188, 69736, 114079, 122038, 130376, 228158, 244076, 374831, 456316, 488152, 749662, 912632, 1499324, 2623817, 2998648, 5247634, 10495268, 20990536]

約数ペア:

[(1, 20990536), (2, 10495268), (4, 5247634), (7, 2998648), (8, 2623817), (14, 1499324), (23, 912632), (28, 749662), (43, 488152), (46, 456316), (56, 374831), (86, 244076), (92, 228158), (161, 130376), (172, 122038), (184, 114079), (301, 69736), (322, 65188), (344, 61019), (379, 55384), (602, 34868), (644, 32594), (758, 27692), (989, 21224), (1204, 17434), (1288, 16297), (1516, 13846), (1978, 10612), (2408, 8717), (2653, 7912), (3032, 6923), (3956, 5306)]