20531200

素因数分解:

$2^{11}\times 5^2\times {\mathrm{401}}^1$

素因数の和:433

約数の個数: 72

約数和(自身を含む): 51031890

約数和(自身を除く): 30500690

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 401, 512, 640, 800, 802, 1024, 1280, 1600, 1604, 2005, 2048, 2560, 3200, 3208, 4010, 5120, 6400, 6416, 8020, 10025, 10240, 12800, 12832, 16040, 20050, 25600, 25664, 32080, 40100, 51200, 51328, 64160, 80200, 102656, 128320, 160400, 205312, 256640, 320800, 410624, 513280, 641600, 821248, 1026560, 1283200, 2053120, 2566400, 4106240, 5132800, 10265600, 20531200]

約数ペア:

[(1, 20531200), (2, 10265600), (4, 5132800), (5, 4106240), (8, 2566400), (10, 2053120), (16, 1283200), (20, 1026560), (25, 821248), (32, 641600), (40, 513280), (50, 410624), (64, 320800), (80, 256640), (100, 205312), (128, 160400), (160, 128320), (200, 102656), (256, 80200), (320, 64160), (400, 51328), (401, 51200), (512, 40100), (640, 32080), (800, 25664), (802, 25600), (1024, 20050), (1280, 16040), (1600, 12832), (1604, 12800), (2005, 10240), (2048, 10025), (2560, 8020), (3200, 6416), (3208, 6400), (4010, 5120)]