21980984

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1453}}^1$

素因数の和:1551

約数の個数: 32

約数和(自身を含む): 43271040

約数和(自身を除く): 21290056

約数列:

[1, 2, 4, 8, 31, 61, 62, 122, 124, 244, 248, 488, 1453, 1891, 2906, 3782, 5812, 7564, 11624, 15128, 45043, 88633, 90086, 177266, 180172, 354532, 360344, 709064, 2747623, 5495246, 10990492, 21980984]

約数ペア:

[(1, 21980984), (2, 10990492), (4, 5495246), (8, 2747623), (31, 709064), (61, 360344), (62, 354532), (122, 180172), (124, 177266), (244, 90086), (248, 88633), (488, 45043), (1453, 15128), (1891, 11624), (2906, 7564), (3782, 5812)]