199421440

素因数分解:

$2^9\times 5^1\times {\mathrm{77899}}^1$

素因数の和:77922

約数の個数: 40

約数和(自身を含む): 478150200

約数和(自身を除く): 278728760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 77899, 155798, 311596, 389495, 623192, 778990, 1246384, 1557980, 2492768, 3115960, 4985536, 6231920, 9971072, 12463840, 19942144, 24927680, 39884288, 49855360, 99710720, 199421440]

約数ペア:

[(1, 199421440), (2, 99710720), (4, 49855360), (5, 39884288), (8, 24927680), (10, 19942144), (16, 12463840), (20, 9971072), (32, 6231920), (40, 4985536), (64, 3115960), (80, 2492768), (128, 1557980), (160, 1246384), (256, 778990), (320, 623192), (512, 389495), (640, 311596), (1280, 155798), (2560, 77899)]