21601240

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{827}}^1$

素因数の和:1491

約数の個数: 32

約数和(自身を含む): 48736080

約数和(自身を除く): 27134840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 827, 1306, 1654, 2612, 3265, 3308, 4135, 5224, 6530, 6616, 8270, 13060, 16540, 26120, 33080, 540031, 1080062, 2160124, 2700155, 4320248, 5400310, 10800620, 21601240]

約数ペア:

[(1, 21601240), (2, 10800620), (4, 5400310), (5, 4320248), (8, 2700155), (10, 2160124), (20, 1080062), (40, 540031), (653, 33080), (827, 26120), (1306, 16540), (1654, 13060), (2612, 8270), (3265, 6616), (3308, 6530), (4135, 5224)]