639800

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{457}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 1703760

約数和(自身を除く): 1063960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 140, 175, 200, 280, 350, 457, 700, 914, 1400, 1828, 2285, 3199, 3656, 4570, 6398, 9140, 11425, 12796, 15995, 18280, 22850, 25592, 31990, 45700, 63980, 79975, 91400, 127960, 159950, 319900, 639800]

約数ペア:

[(1, 639800), (2, 319900), (4, 159950), (5, 127960), (7, 91400), (8, 79975), (10, 63980), (14, 45700), (20, 31990), (25, 25592), (28, 22850), (35, 18280), (40, 15995), (50, 12796), (56, 11425), (70, 9140), (100, 6398), (140, 4570), (175, 3656), (200, 3199), (280, 2285), (350, 1828), (457, 1400), (700, 914)]