666880000

素因数分解:

$2^{11}\times 5^4\times {\mathrm{521}}^1$

素因数の和:563

約数の個数: 120

約数和(自身を含む): 1669457790

約数和(自身を除く): 1002577790

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 512, 521, 625, 640, 800, 1000, 1024, 1042, 1250, 1280, 1600, 2000, 2048, 2084, 2500, 2560, 2605, 3200, 4000, 4168, 5000, 5120, 5210, 6400, 8000, 8336, 10000, 10240, 10420, 12800, 13025, 16000, 16672, 20000, 20840, 25600, 26050, 32000, 33344, 40000, 41680, 51200, 52100, 64000, 65125, 66688, 80000, 83360, 104200, 128000, 130250, 133376, 160000, 166720, 208400, 256000, 260500, 266752, 320000, 325625, 333440, 416800, 521000, 533504, 640000, 651250, 666880, 833600, 1042000, 1067008, 1280000, 1302500, 1333760, 1667200, 2084000, 2605000, 2667520, 3334400, 4168000, 5210000, 5335040, 6668800, 8336000, 10420000, 13337600, 16672000, 20840000, 26675200, 33344000, 41680000, 66688000, 83360000, 133376000, 166720000, 333440000, 666880000]

約数ペア:

[(1, 666880000), (2, 333440000), (4, 166720000), (5, 133376000), (8, 83360000), (10, 66688000), (16, 41680000), (20, 33344000), (25, 26675200), (32, 20840000), (40, 16672000), (50, 13337600), (64, 10420000), (80, 8336000), (100, 6668800), (125, 5335040), (128, 5210000), (160, 4168000), (200, 3334400), (250, 2667520), (256, 2605000), (320, 2084000), (400, 1667200), (500, 1333760), (512, 1302500), (521, 1280000), (625, 1067008), (640, 1042000), (800, 833600), (1000, 666880), (1024, 651250), (1042, 640000), (1250, 533504), (1280, 521000), (1600, 416800), (2000, 333440), (2048, 325625), (2084, 320000), (2500, 266752), (2560, 260500), (2605, 256000), (3200, 208400), (4000, 166720), (4168, 160000), (5000, 133376), (5120, 130250), (5210, 128000), (6400, 104200), (8000, 83360), (8336, 80000), (10000, 66688), (10240, 65125), (10420, 64000), (12800, 52100), (13025, 51200), (16000, 41680), (16672, 40000), (20000, 33344), (20840, 32000), (25600, 26050)]