40990720

素因数分解:

$2^{11}\times 5^1\times {\mathrm{4003}}^1$

素因数の和:4030

約数の個数: 48

約数和(自身を含む): 98378280

約数和(自身を除く): 57387560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2560, 4003, 5120, 8006, 10240, 16012, 20015, 32024, 40030, 64048, 80060, 128096, 160120, 256192, 320240, 512384, 640480, 1024768, 1280960, 2049536, 2561920, 4099072, 5123840, 8198144, 10247680, 20495360, 40990720]

約数ペア:

[(1, 40990720), (2, 20495360), (4, 10247680), (5, 8198144), (8, 5123840), (10, 4099072), (16, 2561920), (20, 2049536), (32, 1280960), (40, 1024768), (64, 640480), (80, 512384), (128, 320240), (160, 256192), (256, 160120), (320, 128096), (512, 80060), (640, 64048), (1024, 40030), (1280, 32024), (2048, 20015), (2560, 16012), (4003, 10240), (5120, 8006)]