18990140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73039}}^1$

素因数の和:73061

約数の個数: 24

約数和(自身を含む): 42947520

約数和(自身を除く): 23957380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 73039, 146078, 292156, 365195, 730390, 949507, 1460780, 1899014, 3798028, 4747535, 9495070, 18990140]

約数ペア:

[(1, 18990140), (2, 9495070), (4, 4747535), (5, 3798028), (10, 1899014), (13, 1460780), (20, 949507), (26, 730390), (52, 365195), (65, 292156), (130, 146078), (260, 73039)]