20120992000

素因数分解:

$2^8\times 5^3\times {\mathrm{628781}}^1$

素因数の和:628812

約数の個数: 72

約数和(自身を含む): 50123985912

約数和(自身を除く): 30002993912

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, 640, 800, 1000, 1280, 1600, 2000, 3200, 4000, 6400, 8000, 16000, 32000, 628781, 1257562, 2515124, 3143905, 5030248, 6287810, 10060496, 12575620, 15719525, 20120992, 25151240, 31439050, 40241984, 50302480, 62878100, 78597625, 80483968, 100604960, 125756200, 157195250, 160967936, 201209920, 251512400, 314390500, 402419840, 503024800, 628781000, 804839680, 1006049600, 1257562000, 2012099200, 2515124000, 4024198400, 5030248000, 10060496000, 20120992000]

約数ペア:

[(1, 20120992000), (2, 10060496000), (4, 5030248000), (5, 4024198400), (8, 2515124000), (10, 2012099200), (16, 1257562000), (20, 1006049600), (25, 804839680), (32, 628781000), (40, 503024800), (50, 402419840), (64, 314390500), (80, 251512400), (100, 201209920), (125, 160967936), (128, 157195250), (160, 125756200), (200, 100604960), (250, 80483968), (256, 78597625), (320, 62878100), (400, 50302480), (500, 40241984), (640, 31439050), (800, 25151240), (1000, 20120992), (1280, 15719525), (1600, 12575620), (2000, 10060496), (3200, 6287810), (4000, 5030248), (6400, 3143905), (8000, 2515124), (16000, 1257562), (32000, 628781)]