20808100

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:229

約数の個数: 72

約数和(自身を含む): 48121920

約数和(自身を除く): 27313820

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 83, 92, 100, 109, 115, 166, 218, 230, 332, 415, 436, 460, 545, 575, 830, 1090, 1150, 1660, 1909, 2075, 2180, 2300, 2507, 2725, 3818, 4150, 5014, 5450, 7636, 8300, 9047, 9545, 10028, 10900, 12535, 18094, 19090, 25070, 36188, 38180, 45235, 47725, 50140, 62675, 90470, 95450, 125350, 180940, 190900, 208081, 226175, 250700, 416162, 452350, 832324, 904700, 1040405, 2080810, 4161620, 5202025, 10404050, 20808100]

約数ペア:

[(1, 20808100), (2, 10404050), (4, 5202025), (5, 4161620), (10, 2080810), (20, 1040405), (23, 904700), (25, 832324), (46, 452350), (50, 416162), (83, 250700), (92, 226175), (100, 208081), (109, 190900), (115, 180940), (166, 125350), (218, 95450), (230, 90470), (332, 62675), (415, 50140), (436, 47725), (460, 45235), (545, 38180), (575, 36188), (830, 25070), (1090, 19090), (1150, 18094), (1660, 12535), (1909, 10900), (2075, 10028), (2180, 9545), (2300, 9047), (2507, 8300), (2725, 7636), (3818, 5450), (4150, 5014)]