256901120

素因数分解:

$2^{20}\times 5^1\times 7^2$

素因数の和:59

約数の個数: 126

約数和(自身を含む): 717225642

約数和(自身を除く): 460324522

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 392, 448, 490, 512, 560, 640, 784, 896, 980, 1024, 1120, 1280, 1568, 1792, 1960, 2048, 2240, 2560, 3136, 3584, 3920, 4096, 4480, 5120, 6272, 7168, 7840, 8192, 8960, 10240, 12544, 14336, 15680, 16384, 17920, 20480, 25088, 28672, 31360, 32768, 35840, 40960, 50176, 57344, 62720, 65536, 71680, 81920, 100352, 114688, 125440, 131072, 143360, 163840, 200704, 229376, 250880, 262144, 286720, 327680, 401408, 458752, 501760, 524288, 573440, 655360, 802816, 917504, 1003520, 1048576, 1146880, 1310720, 1605632, 1835008, 2007040, 2293760, 2621440, 3211264, 3670016, 4014080, 4587520, 5242880, 6422528, 7340032, 8028160, 9175040, 12845056, 16056320, 18350080, 25690112, 32112640, 36700160, 51380224, 64225280, 128450560, 256901120]

約数ペア:

[(1, 256901120), (2, 128450560), (4, 64225280), (5, 51380224), (7, 36700160), (8, 32112640), (10, 25690112), (14, 18350080), (16, 16056320), (20, 12845056), (28, 9175040), (32, 8028160), (35, 7340032), (40, 6422528), (49, 5242880), (56, 4587520), (64, 4014080), (70, 3670016), (80, 3211264), (98, 2621440), (112, 2293760), (128, 2007040), (140, 1835008), (160, 1605632), (196, 1310720), (224, 1146880), (245, 1048576), (256, 1003520), (280, 917504), (320, 802816), (392, 655360), (448, 573440), (490, 524288), (512, 501760), (560, 458752), (640, 401408), (784, 327680), (896, 286720), (980, 262144), (1024, 250880), (1120, 229376), (1280, 200704), (1568, 163840), (1792, 143360), (1960, 131072), (2048, 125440), (2240, 114688), (2560, 100352), (3136, 81920), (3584, 71680), (3920, 65536), (4096, 62720), (4480, 57344), (5120, 50176), (6272, 40960), (7168, 35840), (7840, 32768), (8192, 31360), (8960, 28672), (10240, 25088), (12544, 20480), (14336, 17920), (15680, 16384)]