21386240

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4177}}^1$

素因数の和:4202

約数の個数: 44

約数和(自身を含む): 51314196

約数和(自身を除く): 29927956

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4177, 5120, 8354, 16708, 20885, 33416, 41770, 66832, 83540, 133664, 167080, 267328, 334160, 534656, 668320, 1069312, 1336640, 2138624, 2673280, 4277248, 5346560, 10693120, 21386240]

約数ペア:

[(1, 21386240), (2, 10693120), (4, 5346560), (5, 4277248), (8, 2673280), (10, 2138624), (16, 1336640), (20, 1069312), (32, 668320), (40, 534656), (64, 334160), (80, 267328), (128, 167080), (160, 133664), (256, 83540), (320, 66832), (512, 41770), (640, 33416), (1024, 20885), (1280, 16708), (2560, 8354), (4177, 5120)]