649888940

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1\times {\mathrm{1489}}^1$

素因数の和:1794

約数の個数: 48

約数和(自身を含む): 1384269600

約数和(自身を除く): 734380660

約数列:

[1, 2, 4, 5, 10, 20, 139, 157, 278, 314, 556, 628, 695, 785, 1390, 1489, 1570, 2780, 2978, 3140, 5956, 7445, 14890, 21823, 29780, 43646, 87292, 109115, 206971, 218230, 233773, 413942, 436460, 467546, 827884, 935092, 1034855, 1168865, 2069710, 2337730, 4139420, 4675460, 32494447, 64988894, 129977788, 162472235, 324944470, 649888940]

約数ペア:

[(1, 649888940), (2, 324944470), (4, 162472235), (5, 129977788), (10, 64988894), (20, 32494447), (139, 4675460), (157, 4139420), (278, 2337730), (314, 2069710), (556, 1168865), (628, 1034855), (695, 935092), (785, 827884), (1390, 467546), (1489, 436460), (1570, 413942), (2780, 233773), (2978, 218230), (3140, 206971), (5956, 109115), (7445, 87292), (14890, 43646), (21823, 29780)]