251620880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{64189}}^1$

素因数の和:64216

約数の個数: 60

約数和(自身を含む): 680542380

約数和(自身を除く): 428921500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 64189, 128378, 256756, 320945, 449323, 513512, 641890, 898646, 1027024, 1283780, 1797292, 2246615, 2567560, 3145261, 3594584, 4493230, 5135120, 6290522, 7189168, 8986460, 12581044, 15726305, 17972920, 25162088, 31452610, 35945840, 50324176, 62905220, 125810440, 251620880]

約数ペア:

[(1, 251620880), (2, 125810440), (4, 62905220), (5, 50324176), (7, 35945840), (8, 31452610), (10, 25162088), (14, 17972920), (16, 15726305), (20, 12581044), (28, 8986460), (35, 7189168), (40, 6290522), (49, 5135120), (56, 4493230), (70, 3594584), (80, 3145261), (98, 2567560), (112, 2246615), (140, 1797292), (196, 1283780), (245, 1027024), (280, 898646), (392, 641890), (490, 513512), (560, 449323), (784, 320945), (980, 256756), (1960, 128378), (3920, 64189)]