2005457920

素因数分解:

$2^{10}\times 5^1\times {\mathrm{391691}}^1$

素因数の和:391716

約数の個数: 44

約数和(自身を含む): 4810761144

約数和(自身を除く): 2805303224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 5120, 391691, 783382, 1566764, 1958455, 3133528, 3916910, 6267056, 7833820, 12534112, 15667640, 25068224, 31335280, 50136448, 62670560, 100272896, 125341120, 200545792, 250682240, 401091584, 501364480, 1002728960, 2005457920]

約数ペア:

[(1, 2005457920), (2, 1002728960), (4, 501364480), (5, 401091584), (8, 250682240), (10, 200545792), (16, 125341120), (20, 100272896), (32, 62670560), (40, 50136448), (64, 31335280), (80, 25068224), (128, 15667640), (160, 12534112), (256, 7833820), (320, 6267056), (512, 3916910), (640, 3133528), (1024, 1958455), (1280, 1566764), (2560, 783382), (5120, 391691)]