64780000

素因数分解:

$2^5\times 5^4\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:150

約数の個数: 120

約数和(自身を含む): 165322080

約数和(自身を除く): 100542080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 79, 80, 82, 100, 125, 158, 160, 164, 200, 205, 250, 316, 328, 395, 400, 410, 500, 625, 632, 656, 790, 800, 820, 1000, 1025, 1250, 1264, 1312, 1580, 1640, 1975, 2000, 2050, 2500, 2528, 3160, 3239, 3280, 3950, 4000, 4100, 5000, 5125, 6320, 6478, 6560, 7900, 8200, 9875, 10000, 10250, 12640, 12956, 15800, 16195, 16400, 19750, 20000, 20500, 25625, 25912, 31600, 32390, 32800, 39500, 41000, 49375, 51250, 51824, 63200, 64780, 79000, 80975, 82000, 98750, 102500, 103648, 129560, 158000, 161950, 164000, 197500, 205000, 259120, 316000, 323900, 395000, 404875, 410000, 518240, 647800, 790000, 809750, 820000, 1295600, 1580000, 1619500, 2024375, 2591200, 3239000, 4048750, 6478000, 8097500, 12956000, 16195000, 32390000, 64780000]

約数ペア:

[(1, 64780000), (2, 32390000), (4, 16195000), (5, 12956000), (8, 8097500), (10, 6478000), (16, 4048750), (20, 3239000), (25, 2591200), (32, 2024375), (40, 1619500), (41, 1580000), (50, 1295600), (79, 820000), (80, 809750), (82, 790000), (100, 647800), (125, 518240), (158, 410000), (160, 404875), (164, 395000), (200, 323900), (205, 316000), (250, 259120), (316, 205000), (328, 197500), (395, 164000), (400, 161950), (410, 158000), (500, 129560), (625, 103648), (632, 102500), (656, 98750), (790, 82000), (800, 80975), (820, 79000), (1000, 64780), (1025, 63200), (1250, 51824), (1264, 51250), (1312, 49375), (1580, 41000), (1640, 39500), (1975, 32800), (2000, 32390), (2050, 31600), (2500, 25912), (2528, 25625), (3160, 20500), (3239, 20000), (3280, 19750), (3950, 16400), (4000, 16195), (4100, 15800), (5000, 12956), (5125, 12640), (6320, 10250), (6478, 10000), (6560, 9875), (7900, 8200)]