20997664

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{347}}^1$

素因数の和:449

約数の個数: 48

約数和(自身を含む): 43497216

約数和(自身を除く): 22499552

約数列:

[1, 2, 4, 8, 16, 31, 32, 61, 62, 122, 124, 244, 248, 347, 488, 496, 694, 976, 992, 1388, 1891, 1952, 2776, 3782, 5552, 7564, 10757, 11104, 15128, 21167, 21514, 30256, 42334, 43028, 60512, 84668, 86056, 169336, 172112, 338672, 344224, 656177, 677344, 1312354, 2624708, 5249416, 10498832, 20997664]

約数ペア:

[(1, 20997664), (2, 10498832), (4, 5249416), (8, 2624708), (16, 1312354), (31, 677344), (32, 656177), (61, 344224), (62, 338672), (122, 172112), (124, 169336), (244, 86056), (248, 84668), (347, 60512), (488, 43028), (496, 42334), (694, 30256), (976, 21514), (992, 21167), (1388, 15128), (1891, 11104), (1952, 10757), (2776, 7564), (3782, 5552)]