490400

素因数分解:

$2^5\times 5^2\times {\mathrm{613}}^1$

素因数の和:633

約数の個数: 36

約数和(自身を含む): 1199142

約数和(自身を除く): 708742

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 613, 800, 1226, 2452, 3065, 4904, 6130, 9808, 12260, 15325, 19616, 24520, 30650, 49040, 61300, 98080, 122600, 245200, 490400]

約数ペア:

[(1, 490400), (2, 245200), (4, 122600), (5, 98080), (8, 61300), (10, 49040), (16, 30650), (20, 24520), (25, 19616), (32, 15325), (40, 12260), (50, 9808), (80, 6130), (100, 4904), (160, 3065), (200, 2452), (400, 1226), (613, 800)]