20042800

素因数分解:

$2^4\times 5^2\times {\mathrm{89}}^1\times {\mathrm{563}}^1$

素因数の和:670

約数の個数: 60

約数和(自身を含む): 48780360

約数和(自身を除く): 28737560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 89, 100, 178, 200, 356, 400, 445, 563, 712, 890, 1126, 1424, 1780, 2225, 2252, 2815, 3560, 4450, 4504, 5630, 7120, 8900, 9008, 11260, 14075, 17800, 22520, 28150, 35600, 45040, 50107, 56300, 100214, 112600, 200428, 225200, 250535, 400856, 501070, 801712, 1002140, 1252675, 2004280, 2505350, 4008560, 5010700, 10021400, 20042800]

約数ペア:

[(1, 20042800), (2, 10021400), (4, 5010700), (5, 4008560), (8, 2505350), (10, 2004280), (16, 1252675), (20, 1002140), (25, 801712), (40, 501070), (50, 400856), (80, 250535), (89, 225200), (100, 200428), (178, 112600), (200, 100214), (356, 56300), (400, 50107), (445, 45040), (563, 35600), (712, 28150), (890, 22520), (1126, 17800), (1424, 14075), (1780, 11260), (2225, 9008), (2252, 8900), (2815, 7120), (3560, 5630), (4450, 4504)]