80404000

素因数分解:

$2^5\times 5^3\times {\mathrm{20101}}^1$

素因数の和:20126

約数の個数: 48

約数和(自身を含む): 197562456

約数和(自身を除く): 117158456

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, 20101, 40202, 80404, 100505, 160808, 201010, 321616, 402020, 502525, 643232, 804040, 1005050, 1608080, 2010100, 2512625, 3216160, 4020200, 5025250, 8040400, 10050500, 16080800, 20101000, 40202000, 80404000]

約数ペア:

[(1, 80404000), (2, 40202000), (4, 20101000), (5, 16080800), (8, 10050500), (10, 8040400), (16, 5025250), (20, 4020200), (25, 3216160), (32, 2512625), (40, 2010100), (50, 1608080), (80, 1005050), (100, 804040), (125, 643232), (160, 502525), (200, 402020), (250, 321616), (400, 201010), (500, 160808), (800, 100505), (1000, 80404), (2000, 40202), (4000, 20101)]