20472820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 44403408

約数和(自身を除く): 23930588

約数列:

[1, 2, 4, 5, 10, 20, 61, 97, 122, 173, 194, 244, 305, 346, 388, 485, 610, 692, 865, 970, 1220, 1730, 1940, 3460, 5917, 10553, 11834, 16781, 21106, 23668, 29585, 33562, 42212, 52765, 59170, 67124, 83905, 105530, 118340, 167810, 211060, 335620, 1023641, 2047282, 4094564, 5118205, 10236410, 20472820]

約数ペア:

[(1, 20472820), (2, 10236410), (4, 5118205), (5, 4094564), (10, 2047282), (20, 1023641), (61, 335620), (97, 211060), (122, 167810), (173, 118340), (194, 105530), (244, 83905), (305, 67124), (346, 59170), (388, 52765), (485, 42212), (610, 33562), (692, 29585), (865, 23668), (970, 21106), (1220, 16781), (1730, 11834), (1940, 10553), (3460, 5917)]