256081920

素因数分解:

$2^{15}\times 3^1\times 5^1\times {\mathrm{521}}^1$

素因数の和:559

約数の個数: 128

約数和(自身を含む): 821022480

約数和(自身を除く): 564940560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 256, 320, 384, 480, 512, 521, 640, 768, 960, 1024, 1042, 1280, 1536, 1563, 1920, 2048, 2084, 2560, 2605, 3072, 3126, 3840, 4096, 4168, 5120, 5210, 6144, 6252, 7680, 7815, 8192, 8336, 10240, 10420, 12288, 12504, 15360, 15630, 16384, 16672, 20480, 20840, 24576, 25008, 30720, 31260, 32768, 33344, 40960, 41680, 49152, 50016, 61440, 62520, 66688, 81920, 83360, 98304, 100032, 122880, 125040, 133376, 163840, 166720, 200064, 245760, 250080, 266752, 333440, 400128, 491520, 500160, 533504, 666880, 800256, 1000320, 1067008, 1333760, 1600512, 2000640, 2134016, 2667520, 3201024, 4001280, 4268032, 5335040, 6402048, 8002560, 8536064, 10670080, 12804096, 16005120, 17072128, 21340160, 25608192, 32010240, 42680320, 51216384, 64020480, 85360640, 128040960, 256081920]

約数ペア:

[(1, 256081920), (2, 128040960), (3, 85360640), (4, 64020480), (5, 51216384), (6, 42680320), (8, 32010240), (10, 25608192), (12, 21340160), (15, 17072128), (16, 16005120), (20, 12804096), (24, 10670080), (30, 8536064), (32, 8002560), (40, 6402048), (48, 5335040), (60, 4268032), (64, 4001280), (80, 3201024), (96, 2667520), (120, 2134016), (128, 2000640), (160, 1600512), (192, 1333760), (240, 1067008), (256, 1000320), (320, 800256), (384, 666880), (480, 533504), (512, 500160), (521, 491520), (640, 400128), (768, 333440), (960, 266752), (1024, 250080), (1042, 245760), (1280, 200064), (1536, 166720), (1563, 163840), (1920, 133376), (2048, 125040), (2084, 122880), (2560, 100032), (2605, 98304), (3072, 83360), (3126, 81920), (3840, 66688), (4096, 62520), (4168, 61440), (5120, 50016), (5210, 49152), (6144, 41680), (6252, 40960), (7680, 33344), (7815, 32768), (8192, 31260), (8336, 30720), (10240, 25008), (10420, 24576), (12288, 20840), (12504, 20480), (15360, 16672), (15630, 16384)]