280656640

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:706

約数の個数: 144

約数和(自身を含む): 758209536

約数和(自身を除く): 477552896

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 64, 80, 88, 110, 124, 128, 155, 160, 176, 220, 248, 256, 310, 320, 341, 352, 440, 496, 620, 640, 643, 682, 704, 880, 992, 1240, 1280, 1286, 1364, 1408, 1705, 1760, 1984, 2480, 2572, 2728, 2816, 3215, 3410, 3520, 3968, 4960, 5144, 5456, 6430, 6820, 7040, 7073, 7936, 9920, 10288, 10912, 12860, 13640, 14080, 14146, 19840, 19933, 20576, 21824, 25720, 27280, 28292, 35365, 39680, 39866, 41152, 43648, 51440, 54560, 56584, 70730, 79732, 82304, 87296, 99665, 102880, 109120, 113168, 141460, 159464, 164608, 199330, 205760, 218240, 219263, 226336, 282920, 318928, 398660, 411520, 436480, 438526, 452672, 565840, 637856, 797320, 823040, 877052, 905344, 1096315, 1131680, 1275712, 1594640, 1754104, 1810688, 2192630, 2263360, 2551424, 3189280, 3508208, 4385260, 4526720, 5102848, 6378560, 7016416, 8770520, 9053440, 12757120, 14032832, 17541040, 25514240, 28065664, 35082080, 56131328, 70164160, 140328320, 280656640]

約数ペア:

[(1, 280656640), (2, 140328320), (4, 70164160), (5, 56131328), (8, 35082080), (10, 28065664), (11, 25514240), (16, 17541040), (20, 14032832), (22, 12757120), (31, 9053440), (32, 8770520), (40, 7016416), (44, 6378560), (55, 5102848), (62, 4526720), (64, 4385260), (80, 3508208), (88, 3189280), (110, 2551424), (124, 2263360), (128, 2192630), (155, 1810688), (160, 1754104), (176, 1594640), (220, 1275712), (248, 1131680), (256, 1096315), (310, 905344), (320, 877052), (341, 823040), (352, 797320), (440, 637856), (496, 565840), (620, 452672), (640, 438526), (643, 436480), (682, 411520), (704, 398660), (880, 318928), (992, 282920), (1240, 226336), (1280, 219263), (1286, 218240), (1364, 205760), (1408, 199330), (1705, 164608), (1760, 159464), (1984, 141460), (2480, 113168), (2572, 109120), (2728, 102880), (2816, 99665), (3215, 87296), (3410, 82304), (3520, 79732), (3968, 70730), (4960, 56584), (5144, 54560), (5456, 51440), (6430, 43648), (6820, 41152), (7040, 39866), (7073, 39680), (7936, 35365), (9920, 28292), (10288, 27280), (10912, 25720), (12860, 21824), (13640, 20576), (14080, 19933), (14146, 19840)]