21215500

素因数分解:

$2^2\times 5^3\times {\mathrm{151}}^1\times {\mathrm{281}}^1$

素因数の和:451

約数の個数: 48

約数和(自身を含む): 46807488

約数和(自身を除く): 25591988

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 151, 250, 281, 302, 500, 562, 604, 755, 1124, 1405, 1510, 2810, 3020, 3775, 5620, 7025, 7550, 14050, 15100, 18875, 28100, 35125, 37750, 42431, 70250, 75500, 84862, 140500, 169724, 212155, 424310, 848620, 1060775, 2121550, 4243100, 5303875, 10607750, 21215500]

約数ペア:

[(1, 21215500), (2, 10607750), (4, 5303875), (5, 4243100), (10, 2121550), (20, 1060775), (25, 848620), (50, 424310), (100, 212155), (125, 169724), (151, 140500), (250, 84862), (281, 75500), (302, 70250), (500, 42431), (562, 37750), (604, 35125), (755, 28100), (1124, 18875), (1405, 15100), (1510, 14050), (2810, 7550), (3020, 7025), (3775, 5620)]