20007768500

素因数分解:

$2^2\times 5^3\times {\mathrm{37}}^1\times {\mathrm{1081501}}^1$

素因数の和:1081557

約数の個数: 48

約数和(自身を含む): 44878006992

約数和(自身を除く): 24870238492

約数列:

[1, 2, 4, 5, 10, 20, 25, 37, 50, 74, 100, 125, 148, 185, 250, 370, 500, 740, 925, 1850, 3700, 4625, 9250, 18500, 1081501, 2163002, 4326004, 5407505, 10815010, 21630020, 27037525, 40015537, 54075050, 80031074, 108150100, 135187625, 160062148, 200077685, 270375250, 400155370, 540750500, 800310740, 1000388425, 2000776850, 4001553700, 5001942125, 10003884250, 20007768500]

約数ペア:

[(1, 20007768500), (2, 10003884250), (4, 5001942125), (5, 4001553700), (10, 2000776850), (20, 1000388425), (25, 800310740), (37, 540750500), (50, 400155370), (74, 270375250), (100, 200077685), (125, 160062148), (148, 135187625), (185, 108150100), (250, 80031074), (370, 54075050), (500, 40015537), (740, 27037525), (925, 21630020), (1850, 10815010), (3700, 5407505), (4625, 4326004), (9250, 2163002), (18500, 1081501)]