21728140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155201}}^1$

素因数の和:155217

約数の個数: 24

約数和(自身を含む): 52147872

約数和(自身を除く): 30419732

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155201, 310402, 620804, 776005, 1086407, 1552010, 2172814, 3104020, 4345628, 5432035, 10864070, 21728140]

約数ペア:

[(1, 21728140), (2, 10864070), (4, 5432035), (5, 4345628), (7, 3104020), (10, 2172814), (14, 1552010), (20, 1086407), (28, 776005), (35, 620804), (70, 310402), (140, 155201)]