21570100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5261}}^1$

素因数の和:5316

約数の個数: 36

約数和(自身を含む): 47957868

約数和(自身を除く): 26387768

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5261, 10522, 21044, 26305, 52610, 105220, 131525, 215701, 263050, 431402, 526100, 862804, 1078505, 2157010, 4314020, 5392525, 10785050, 21570100]

約数ペア:

[(1, 21570100), (2, 10785050), (4, 5392525), (5, 4314020), (10, 2157010), (20, 1078505), (25, 862804), (41, 526100), (50, 431402), (82, 263050), (100, 215701), (164, 131525), (205, 105220), (410, 52610), (820, 26305), (1025, 21044), (2050, 10522), (4100, 5261)]