20120000

素因数分解:

$2^6\times 5^4\times {\mathrm{503}}^1$

素因数の和:535

約数の個数: 70

約数和(自身を含む): 49990248

約数和(自身を除く): 29870248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 503, 625, 800, 1000, 1006, 1250, 1600, 2000, 2012, 2500, 2515, 4000, 4024, 5000, 5030, 8000, 8048, 10000, 10060, 12575, 16096, 20000, 20120, 25150, 32192, 40000, 40240, 50300, 62875, 80480, 100600, 125750, 160960, 201200, 251500, 314375, 402400, 503000, 628750, 804800, 1006000, 1257500, 2012000, 2515000, 4024000, 5030000, 10060000, 20120000]

約数ペア:

[(1, 20120000), (2, 10060000), (4, 5030000), (5, 4024000), (8, 2515000), (10, 2012000), (16, 1257500), (20, 1006000), (25, 804800), (32, 628750), (40, 503000), (50, 402400), (64, 314375), (80, 251500), (100, 201200), (125, 160960), (160, 125750), (200, 100600), (250, 80480), (320, 62875), (400, 50300), (500, 40240), (503, 40000), (625, 32192), (800, 25150), (1000, 20120), (1006, 20000), (1250, 16096), (1600, 12575), (2000, 10060), (2012, 10000), (2500, 8048), (2515, 8000), (4000, 5030), (4024, 5000)]