21575440

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^2\times {\mathrm{197}}^1$

素因数の和:284

約数の個数: 60

約数和(自身を含む): 51816996

約数和(自身を除く): 30241556

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 197, 296, 370, 394, 592, 740, 788, 985, 1369, 1480, 1576, 1970, 2738, 2960, 3152, 3940, 5476, 6845, 7289, 7880, 10952, 13690, 14578, 15760, 21904, 27380, 29156, 36445, 54760, 58312, 72890, 109520, 116624, 145780, 269693, 291560, 539386, 583120, 1078772, 1348465, 2157544, 2696930, 4315088, 5393860, 10787720, 21575440]

約数ペア:

[(1, 21575440), (2, 10787720), (4, 5393860), (5, 4315088), (8, 2696930), (10, 2157544), (16, 1348465), (20, 1078772), (37, 583120), (40, 539386), (74, 291560), (80, 269693), (148, 145780), (185, 116624), (197, 109520), (296, 72890), (370, 58312), (394, 54760), (592, 36445), (740, 29156), (788, 27380), (985, 21904), (1369, 15760), (1480, 14578), (1576, 13690), (1970, 10952), (2738, 7880), (2960, 7289), (3152, 6845), (3940, 5476)]