21362780

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{6553}}^1$

素因数の和:6725

約数の個数: 24

約数和(自身を含む): 45143952

約数和(自身を除く): 23781172

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 6553, 13106, 26212, 32765, 65530, 131060, 1068139, 2136278, 4272556, 5340695, 10681390, 21362780]

約数ペア:

[(1, 21362780), (2, 10681390), (4, 5340695), (5, 4272556), (10, 2136278), (20, 1068139), (163, 131060), (326, 65530), (652, 32765), (815, 26212), (1630, 13106), (3260, 6553)]