21619520

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5197}}^1$

素因数の和:5227

約数の個数: 56

約数和(自身を含む): 55452264

約数和(自身を除く): 33832744

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5197, 10394, 20788, 25985, 41576, 51970, 67561, 83152, 103940, 135122, 166304, 207880, 270244, 332608, 337805, 415760, 540488, 675610, 831520, 1080976, 1351220, 1663040, 2161952, 2702440, 4323904, 5404880, 10809760, 21619520]

約数ペア:

[(1, 21619520), (2, 10809760), (4, 5404880), (5, 4323904), (8, 2702440), (10, 2161952), (13, 1663040), (16, 1351220), (20, 1080976), (26, 831520), (32, 675610), (40, 540488), (52, 415760), (64, 337805), (65, 332608), (80, 270244), (104, 207880), (130, 166304), (160, 135122), (208, 103940), (260, 83152), (320, 67561), (416, 51970), (520, 41576), (832, 25985), (1040, 20788), (2080, 10394), (4160, 5197)]