20404000

素因数分解:

$2^5\times 5^3\times {\mathrm{5101}}^1$

素因数の和:5126

約数の個数: 48

約数和(自身を含む): 50142456

約数和(自身を除く): 29738456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5101, 10202, 20404, 25505, 40808, 51010, 81616, 102020, 127525, 163232, 204040, 255050, 408080, 510100, 637625, 816160, 1020200, 1275250, 2040400, 2550500, 4080800, 5101000, 10202000, 20404000]

約数ペア:

[(1, 20404000), (2, 10202000), (4, 5101000), (5, 4080800), (8, 2550500), (10, 2040400), (16, 1275250), (20, 1020200), (25, 816160), (32, 637625), (40, 510100), (50, 408080), (80, 255050), (100, 204040), (125, 163232), (160, 127525), (200, 102020), (250, 81616), (400, 51010), (500, 40808), (800, 25505), (1000, 20404), (2000, 10202), (4000, 5101)]