256737040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:717

約数の個数: 160

約数和(自身を含む): 735952896

約数和(自身を除く): 479215856

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 31, 35, 40, 46, 56, 62, 70, 80, 92, 112, 115, 124, 140, 155, 161, 184, 217, 230, 248, 280, 310, 322, 368, 434, 460, 496, 560, 620, 643, 644, 713, 805, 868, 920, 1085, 1240, 1286, 1288, 1426, 1610, 1736, 1840, 2170, 2480, 2572, 2576, 2852, 3215, 3220, 3472, 3565, 4340, 4501, 4991, 5144, 5704, 6430, 6440, 7130, 8680, 9002, 9982, 10288, 11408, 12860, 12880, 14260, 14789, 17360, 18004, 19933, 19964, 22505, 24955, 25720, 28520, 29578, 36008, 39866, 39928, 45010, 49910, 51440, 57040, 59156, 72016, 73945, 79732, 79856, 90020, 99665, 99820, 103523, 118312, 139531, 147890, 159464, 180040, 199330, 199640, 207046, 236624, 279062, 295780, 318928, 360080, 398660, 399280, 414092, 458459, 517615, 558124, 591560, 697655, 797320, 828184, 916918, 1035230, 1116248, 1183120, 1395310, 1594640, 1656368, 1833836, 2070460, 2232496, 2292295, 2790620, 3209213, 3667672, 4140920, 4584590, 5581240, 6418426, 7335344, 8281840, 9169180, 11162480, 12836852, 16046065, 18338360, 25673704, 32092130, 36676720, 51347408, 64184260, 128368520, 256737040]

約数ペア:

[(1, 256737040), (2, 128368520), (4, 64184260), (5, 51347408), (7, 36676720), (8, 32092130), (10, 25673704), (14, 18338360), (16, 16046065), (20, 12836852), (23, 11162480), (28, 9169180), (31, 8281840), (35, 7335344), (40, 6418426), (46, 5581240), (56, 4584590), (62, 4140920), (70, 3667672), (80, 3209213), (92, 2790620), (112, 2292295), (115, 2232496), (124, 2070460), (140, 1833836), (155, 1656368), (161, 1594640), (184, 1395310), (217, 1183120), (230, 1116248), (248, 1035230), (280, 916918), (310, 828184), (322, 797320), (368, 697655), (434, 591560), (460, 558124), (496, 517615), (560, 458459), (620, 414092), (643, 399280), (644, 398660), (713, 360080), (805, 318928), (868, 295780), (920, 279062), (1085, 236624), (1240, 207046), (1286, 199640), (1288, 199330), (1426, 180040), (1610, 159464), (1736, 147890), (1840, 139531), (2170, 118312), (2480, 103523), (2572, 99820), (2576, 99665), (2852, 90020), (3215, 79856), (3220, 79732), (3472, 73945), (3565, 72016), (4340, 59156), (4501, 57040), (4991, 51440), (5144, 49910), (5704, 45010), (6430, 39928), (6440, 39866), (7130, 36008), (8680, 29578), (9002, 28520), (9982, 25720), (10288, 24955), (11408, 22505), (12860, 19964), (12880, 19933), (14260, 18004), (14789, 17360)]