20494780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{157}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 44434656

約数和(自身を除く): 23939876

約数列:

[1, 2, 4, 5, 10, 20, 61, 107, 122, 157, 214, 244, 305, 314, 428, 535, 610, 628, 785, 1070, 1220, 1570, 2140, 3140, 6527, 9577, 13054, 16799, 19154, 26108, 32635, 33598, 38308, 47885, 65270, 67196, 83995, 95770, 130540, 167990, 191540, 335980, 1024739, 2049478, 4098956, 5123695, 10247390, 20494780]

約数ペア:

[(1, 20494780), (2, 10247390), (4, 5123695), (5, 4098956), (10, 2049478), (20, 1024739), (61, 335980), (107, 191540), (122, 167990), (157, 130540), (214, 95770), (244, 83995), (305, 67196), (314, 65270), (428, 47885), (535, 38308), (610, 33598), (628, 32635), (785, 26108), (1070, 19154), (1220, 16799), (1570, 13054), (2140, 9577), (3140, 6527)]