28388220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{263}}^1$

素因数の和:539

約数の個数: 96

約数和(自身を含む): 91542528

約数和(自身を除く): 63154308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 257, 263, 420, 514, 526, 771, 789, 1028, 1052, 1285, 1315, 1542, 1578, 1799, 1841, 2570, 2630, 3084, 3156, 3598, 3682, 3855, 3945, 5140, 5260, 5397, 5523, 7196, 7364, 7710, 7890, 8995, 9205, 10794, 11046, 15420, 15780, 17990, 18410, 21588, 22092, 26985, 27615, 35980, 36820, 53970, 55230, 67591, 107940, 110460, 135182, 202773, 270364, 337955, 405546, 473137, 675910, 811092, 946274, 1013865, 1351820, 1419411, 1892548, 2027730, 2365685, 2838822, 4055460, 4731370, 5677644, 7097055, 9462740, 14194110, 28388220]

約数ペア:

[(1, 28388220), (2, 14194110), (3, 9462740), (4, 7097055), (5, 5677644), (6, 4731370), (7, 4055460), (10, 2838822), (12, 2365685), (14, 2027730), (15, 1892548), (20, 1419411), (21, 1351820), (28, 1013865), (30, 946274), (35, 811092), (42, 675910), (60, 473137), (70, 405546), (84, 337955), (105, 270364), (140, 202773), (210, 135182), (257, 110460), (263, 107940), (420, 67591), (514, 55230), (526, 53970), (771, 36820), (789, 35980), (1028, 27615), (1052, 26985), (1285, 22092), (1315, 21588), (1542, 18410), (1578, 17990), (1799, 15780), (1841, 15420), (2570, 11046), (2630, 10794), (3084, 9205), (3156, 8995), (3598, 7890), (3682, 7710), (3855, 7364), (3945, 7196), (5140, 5523), (5260, 5397)]